Hamilton Pilot's Vintage Pocket Watch Conversion Calibre 921 Made in USA - ClockSavant
Hamilton Pilot's Vintage Pocket Watch Conversion Calibre 921 Made in USA - ClockSavant
Hamilton Pilot's Vintage Pocket Watch Conversion Calibre 921 Made in USA - ClockSavant
Hamilton Pilot's Vintage Pocket Watch Conversion Calibre 921 Made in USA - ClockSavant

Hamilton Pilot's Vintage Pocket Watch Conversion Calibre 921 Made in USA

Regular price $1,195.00 Sale

Contact us today via email (contact_inquiry@clocksavant.com) or call us at +1 (703) 457-6820 to purchase this watch or learn more. We are happy to answer any questions.


This is the second Hamilton 921 pocket watch conversion we have made available, our first has been sold. This watch doesn't need a lot of words, its raw beauty and performance speaks for itself. ClockSavant provided design input into this watch in collaboration with a very talented and dedicated outside watchmaker who performed all of the work in sourcing, servicing, and manufacturing the watch. This is a true one-of-a-kind design. The vintage movement is a made-in-the-USA Hamilton Calibre 921 vintage pocket watch manufactured in 1947. This was one of Hamilton s finest movements. The movement was removed from a pocket watch, completely disassembled and serviced by the outside watchmaker working with ClockSavant, and then custom fit and assembled into the new modern case. We fitted a high quality deployant which was finished to match the case of the watch. If anyone ever asks you about the quality of made in the USA watches, you can show them the Hamilton 921 movement through the exhibition case back and their eyes will likely glaze over with admiration. We made great watches in the USA and it s a shame we don t make them any more. There are fledgling watchmakers working to recreate our history, and at ClockSavant we work to do our part by keeping horology and watchmaking alive with innovation, passion, and excellence in the USA. This is a large 42mm watch, if you like larger watches you will it very much. It has a pilot aviator inspired design with a unique satin sandblasted finish. Both the front and back crystals are made of sapphire with anti reflective coating. 



Hamilton 921


Manual Wind


Hamilton 921






42mm excluding crown, 52mm lug to lug


  Leather watch band


The movement was manufactured in approximately 1937 based on a serial number factory archive search. The watch conversion was performed in 2012

Service History

The service work was performed by an outside watchmaker under contract with ClockSavant in approximately 2012. The watchmaker disassembled, old and worn parts replaced or repaired, adjusted, optimized, cleaned, and lubricated. ClockSavnt has performed comprehensive testing and performance measurement.


Watch is in like new condition


14-day inspection period provided that watch is returned in condition received.


2 month warranty-- customer misuse, neglect, accidental, intentional, or unintentional damage are excluded from the warranty. See the Support page of our website for detailed warranty terms and conditions. For non-warranty damage, please contact us to obtain an estimate for servicing, repair, and restoration services.

Care and Use

All mechanical watches, and especially vintage watches, require special consideration in handling, care, and use. In order to obtain warranty support or to return an item, it is necessary that the customer did not cause damage to the watch. See the Support page to learn more about how to protect and care for your investment.

Unique Operation
Sales tax

Virginia residents will pay sales tax

ClockSavant Watchmaker Testing, Certification, and Performance Measurement

All the watches we sell go through a comprehensive series of ClockSavant-developed functional, stability, and performance tests and are only approved for sale if they meet or exceed the criteria we have established. Performance measurements for this watch are provided below. See the Support page of our website for an explanation of watch performance measurements and guidance on interpretation. The watch performance values provided do not necessarily reflect the accuracy you will experience based on your unique watch wearing habits. You may experience a gain or loss by as much as approximately 1 minute per day with vintage watches. Legend: Rate, Amplitude (Amp), and Beat Error (BE) are provided for Dial-Up (CH) and Dial-Down (FH) positions. Averages (Avg) are also provided. These represent the average performance of the watch across all 6 traditionally measured watch positions which, in addition to dial-up and dial-down, are the vertical positions of Crown-Up, Crown-Down, Crown-Left, and Crown-Right. Rate is expressed in seconds gained or lost during a 24 hour period. Amplitude is in degrees. Beat Error is in milliseconds. Lift Angle used in measurement is unique to the particular watch calibre.

Lift Angle


CH Rate




CH Amp


FH Rate


FH Amp




Avg Rate


Avg Amp


Avg BE


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