So the runners and riders for my chronometer trial
This is not a chronometer. It would be useless on a ship. It is bolted to the spine wall of my house and has a huge pendulum bob. At the time it was made it was one of the standard high precision clocks used by people who couldn't afford the really, really accurate ones like Shortt-Synchronomes. I expect it will do very well unless we get a power cut or Erin unplugs it by mistake when vacuum cleaning.
Widely believed to be the best mass produced mechanical chronometer of all time. It cost Uncle Sam USD390 in Jan 45 and he used it until the 70s.
In 1942 cost Uncle Sam USD82.50 about USD25 was for the box. I am very interested to see how well it does compared with the Hamilton 21.
Buckney deck watch
Late 19th century deck watch designed to transfer knowledge of the time between the deck and the chronometer room. It came second in a Greenwich Deck Watch trial and hence was bought by the Navy for GBP18 which was then USD90 who kept it until 1922.
Swiss pocket watch
Unsigned but hallmarked 1922. I've been meaning to service it for the last 20 years.
Smiths Deluxe 18 jewel
The high point of English wristwatch volume production.
Wempe Type 904
Early Wempe quartz chronometer with subsidiary seconds and electronics in a separate compartment.
Wempe Type 10057
The current version with centre seconds and integral electronics.
Late model made just after German reunification.
Early Japanese quartz chronometer.
The test protocol is basic. All will run for several days before the test itself starts. At about the same time each day the time displayed by each timepiece will be compared with the time reported by time.is. Mechanical devices will be rewound. The procedure will be repeated each day until I decide to stop.