Just made a few videos of my Hamilton Model 21. 4k definition 120 fps (slo-mo starts after about 10 seconds)
I just recently serviced my Hamilton model 21 detent chronometer, and replaced the mainspring. They are beautifully made, and very nice to work on. But before anybody considers tacking one, make certain you have the model 21 manual! @Deafboy serviced his chronometer, himself, and it looks like a splendid job. Hamilton produced more model 21 s in an average month than some chronometer manufacturers produced in the lifetime of their business. In my view, this is one of the most successful marine chronometers ever produced.
Chronometers! No home should be without chronometers! At least a Hamilton model 22 (left), and model 21 (right). Also shown is the movement of the model 22. It is 35-size, 21 jewels, adjusted to 6 positions, temperature, and isochronism. Stem wound, runs about 3 days on a winding. The model 22 is known by a number of different names. But torpedo boat chronometer fits. It was used also by coastal patrol, mine sweepers, tankers, freighters, merchant marine, and also by navy ships such as hospital ships, that usually travelled with armed naval vessels.
Here is the pocketwatchdatabase listing for @Deafboy ’s handsome model 21 Hamilton chronometer. https://pocketwatchdatabase.com/search/result/hamilton/2E5572
Nice model 21 here is a group shot of mine. The model 21 then the model 22 both models one in a gimble box the other in none gimble box, And the Hamilton comparing watch.
Here is one of the last chronometers the US navy used before depending on GPS from something bountifully made to a quartz chronometer kind of a downer.
Two features jump out at me on the quartz chronometer. One: The 24-hour dial, and Two: the use of 00 rather than 24 hours. Those of us who collect these instruments can thank satellite navigation for the availability of our collectibles.
That quartz one was the best deal I ever got for a chronometer off eBay you don't see them much on eBay. Got it cheap. Talked to another collector who has one he said the guy he got his off of said it came off an aircraft carrier when it was in the yards for Maintenace the Navy was removing them.
Here is my oldest issued US Navy chronometer or some call it a deck watch from WW1 Waltham used a car clock and up jewel it and put a wind indicator on it. This is an eight-day movement.