I bought it at auction so I know nothing of its background. It runs but how accurately I do not know. I agree its seen little use.
I've had it about 10years
Its serial number is 19666 from about 1951
There is a matching recorder but I've never seen one.
If you don't know its...
The third of Roberts book deals with 'Precision Clocks from France , Germany, America and Recent Advancements' and deals with the likes of Janvier Berthoud Brequet Riefler, Strasse and Rohde.
Its a great book with wonderful photography, but does not specifically mention 'Jewellers regulator' as...
I am lucky enough to have a karrusel retailed by Army and Navy serial number 9008 (in a Thoms case)
It has three Kew A certificates for 1905, 1907 and 1911. It was awarded 83.2 marks in 1911
I don't know the maker,
Looking through the Kew records 1901 to 1907 , as far as I can see all are...
The National Maritime Museum has 4209 and Bett's recent book 'Marine Chronometers at Greenwich' fully describes it, including the fact that it was made circa 1866.
(The 'made' date being likely the sale date, marine chronometers took up to about 3 years to make and finish)
So it is a fair...
I got 1922 from Tony Mercer's book. 1922 was the year that Mercer decided to make the Survey chronometer after Kullberg introduced an example.
Tom, I think maybe that the push switch In the Greenwich picture) is a 'push to run ' switch. The explosive expert calls out 'T-5' and you push the...
I have 19666. Mercer says they were first made in 1922. I do not know how many were made.
They were, as you say, a basic 2-day chronometer redesigned to add a 1 second pulse output.
A complimentary receiver exists, but I have never seen one.
If he visits Cambridge he might like to visit Corpus Christi college and view the Chronophage. There's much written about this unique clock, here's one:
The Chronophage - John C Taylor