Hamilton 16S 21J LS adj. 5p grade 992 pocket watch #2371341, WGF SB&B Keystone Mainliner case

Hamilton 16S 21J LS adj. 5p grade 992 pocket watch #2371341, WGF SB&B Keystone Mainliner case

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Hamilton 16S 21J lever set (LS) adj. 5p grade 992 pocket watch #2371341, handsome nickel split plate movement with screw-down gold jewel settings (GJS), a gold center wheel and a bar style damascene pattern, double sunk (DS) porcelain enamel dial with bold fancy Arabic numbers, red Arabic 5 minute markers and a black-marked subsidiary seconds register has a small hairline at the edge under the bezel and a short scratch near the "55" but is otherwise mint, bold blue steel spade & whip style hands, impressive white gold filled (WGF) smooth polish screw back & bezel (SB&B) Mainliner model case by Keystone with varying width vertical line engraving on the back cover behind elaborate art deco style geometric & floral designs at 12 & 6 o'clock, center fancy blank monogram shield, coin edge bezels, a short heavy pendant with a sculpted detail around the recessed crown and a fancy heavy square bow, case is showing normal even wear with a little smoothing to the art deco engravings, a small shallow dent on the frame and a few small spots of brass on the pendant & bow, measures approx. 51mm in diameter x 65mm in length x 15mm thick (crystal included). A heavy & impressive railroad grade Hamilton workhorse from the 1920s in excellent+ overall condition!
  • Year Made: 1926-1927
  • Company: Hamilton
  • Movement Size: 0516S
  • Jewels: 0721J
  • Setting/Movement Type: lever set
  • Adjustments: 5 positions
  • Model/Grade: 992
  • Serial #: 2371341
  • Movement Finish: nickel
  • Movement Details: gold jewel settings (GJS), screw-down jewel settings, gold center wheel
  • Dial Material: porcelain enamel
  • Dial Details: double sunk (DS)
  • Hand Style: spade & whip
  • Case Style: SB&B
  • Case Material: Gold Filled - White
  • Case Details: Keystone "Mainliner" model, fancy bow, recessed crown
  • Case Width/Diameter: 51mm (2.01 inches)
  • Case Length, bow included:  65mm (2.56 inches)
  • Case Thickness:  15mm (0.59 inches)
  • Crystal Material: plastic
  • Condition: Excellent +
  • Gender: Gentlemen's
The Hamilton watch company began business in Lancaster, Pennsylvania in 1892 and still operates today. The last watches produced in the American factory were made in 1969, after which the company was sold to a Swiss owner.

We also offer a collection of reference and research books for a number of different watch manufacturers, which can be found in our Watch-Related Books section. As an additional resource, we've posted a Serial Number Production List which includes information for Hamilton serial numbers and dates of manufacture.
The NAWCC also has a comprehensive article about the company; additional information may also be found on Wikipedia.
You may browse all of our men's pocket watches from this manufacturer at our Vintage Men's Hamilton Pocket Watches category.
This watch is in good running condition, unless otherwise noted in the description. This means that on receipt, pending any item-specific running conditions noted in the description, you can expect the watch to be winding and setting properly and to run smoothly while keeping reasonable time. We consider "reasonable time" to meet these basic guidelines:
  • Railroad Grade Watches will be keeping +/- 5 minutes per day
  • Pocket and Wrist Watches with 15 or more jewels will be keeping +/- 10 minutes per day
  • All key wind watches and watches with 14 or fewer jewels will be keeping +/- 15 minutes per day
The above guideline is the lowest standard in which we would ship out a watch, however in most cases, you will see much better timekeeping. Most of our watches have been in storage for many years, so if you plan on carrying/wearing them everyday, you should consider having them cleaned and oiled soon, and then once a year thereafter to keep them in top running condition. If the watches will be for occasional use or display, they should be cleaned and serviced every 3 to 5 years depending on use.

As of December 30th, 2024, we are not offering a cleaning and service option through PM Time Service. While we do hope to offer this again in the future, we are unfortunately unable to meet customer requests for watch servicing at this time. Please note that, unless otherwise mentioned within the "Full Description" tab, this watch is being sold in good running condition and is ready to wear or carry on arrival.
This watch comes complete with an appropriate, intact plastic crystal; however, on request PM Time Service can replace the current crystal on this pocket watch for you. We offer a number of new and vintage crystal choices for pocket watches; you can select your desired choice from the dropdown menu below.
Please note that the average turnaround time for all pocket watch crystal replacements will be two days from the placement of the order.

Contact us with any further questions or for an estimate on any shipping delays.


Please note: if you add this watch with a crystal and/or band exchange option to your shopping cart but later change your mind on the crystal and/or band selection type, you'll need to remove the watch from the cart in order to make a new selection. Once that is done, you can return to this page and add that new crystal and/or band combination to the cart. We apologize for the limitations to our system that prevent you from making that change within the shopping cart.

This is considered a "railroad-grade" pocket watch. To be a railroad-grade watch, the following criteria must be met:
  • be 16S or 18S
  • have 17 or more jewels
  • be lever set
  • be in an open face case
  • be adjusted to 5 or more positions.
  • have easily-legible Arabic dial numerals
In order to ensure the accuracy of pocket watches used by railroad employees, with the ultimate goal of preventing train accidents, the General Railroad Timepiece Standards Commission published a set of guidelines for railroad companies and watch manufacturers in 1893. These guidelines, which specified the criteria for a railroad-grade watch, were prepared by Webb C. Ball, the general time inspector of North American railroads and founder of the Ball Watch Company.

For more information, visit this Wikipedia article on railroad chronometers or this Smithsonian National Postal Museum article on the influential train wreck tragedy that resulted in the establishment of railroad watch standards.

Our entire collection of such timepieces may also be viewed at our Railroad Grade Watches category.
Unlike modern quartz watches, most vintage watches need daily winding in order to keep the watch functioning for timekeeping. Additionally, there are a number of different ways to set the time other than simply pulling the crown away from the watch body. We are happy to provide an overview of each of the different setting types on our "How To Use" page, where we also provide information on proper winding techniques for each style and some suggestions for the proper long term care and storage of your watch.

For additional information on gold colors and how they are classified, please check out this helpful Wikipedia article.

For your gift giving convenience, please find a consolidated overview of the information on this item, with no reference to the price, on this printer-optimized page.

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  • Understanding Our Descriptions
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We process a very large number of watches and accessories each year for sale via our website, eBay and local avenues. We attempt to offer descriptions and photos that are as complete and clear as possible on each item, and we always encourage you to write us with questions if something is not addressed in the description!

In each description, we attempt to note the following things:
<maker><size><jewels><setting><adjustments><grade/model><serial number>, <movement information>, <dial information>, <hand information>, <case information>, <misc. information>, <overall condition and comments>

Taking an example of a watch already described, we've bracketed the different sections and ordered them as above:
<Ball-Hamilton> <16S> <21J> <LS> <adj.> <Official RR Standard> <#B651197>, <nickel movement with gold jewel settings and concentric circle damascene pattern, should be noted that the gears on the movement may not be all original however watch is running strong and not affecting running condition>, <porcelain Ball marked dial with Arabic numbers has very faint hairline (not distracting)>, <blue steel hands>, <beautiful YGF SB&B Ball marked case with engraved bezels and blank monogram shield showing normal even wear (no brass)>, <fancy bow>. <High grade Ball watch in very good condition, perfect to carry everyday!>

We also provide a List of Abbreviations that we use in our descriptions, as well as a Pocket Watch Sizing Chart that explains numerically and graphically the various sizes of pocket watches that we offer.
We offer a 30-day return period beginning the day you receive your items for all PM Time Service merchandise. To receive a full refund, the item must be return in "as shipped" condition, with no new personalized engravings or end-user adaptions. Items damaged in transit will be eligible for the full refund pending the application of the insurance claim on the damaged watch or item. Please see our Shipping & Return Policy page for full details.
Holiday & Vacation Dates - Unless otherwise noted on our holiday page, you can expect an order placed to be processed and shipped out within 2-3 business days, often much sooner. If you need an item quickly, please do double check our holiday page to make sure we will be in the office!

Please use the "Estimate Your Shipping" button on the Shopping Basket page to get a specific quote on your current shipping fees. The estimate will be available once you have added at least one (1) item to your shopping cart.

In order to provide a fair and secure shipping experience for our customers, and protect your valuable purchases, we include full insurance for the total value of your order with all items purchased. At this time, we do not allow for a customer to opt-out of insurance on their shipments. Details may be found at our Shipping, Insurance, & Return Policy page.

We are happy to accept credit cards and PayPal, as well as checks and money orders, for payment on all orders.

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We may also offer this product for purchase from our other PM Time Service online shops, should you prefer a different purchasing platform. If this item is already listed on these marketplaces, links to those listings are provided below; otherwise, a "contact us" link will appear allowing you to request a custom listing be created for you.

PM Time Service eBay Store:

  • Currently available only at pmtime.com; contact us to request this item be listed on eBay.

PM Time Service Etsy Shop:

  • Currently available only at pmtime.com; contact us to request this item be listed on Etsy.

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