Chronometrie

Meylan watches at the Geneva Observatory Chronometer trials

Regleurs

Alex Favre
8205
8208
8209
8439
8440
8441
8443

 

 

Meylan results at the Observatory by year

1894 - 8205, 8208, 8209, 8439, 8440, 8441, 8443

 

 

Results by points

242.8 - 8441
213.7 - 8440
212.7 - 8439
198.0 - 8443
196.8 - 8205
181.6 - 8208
176.4 - 8209

 

Calculations

Daily mean deviation=m
Mean deviation by position=p
Error compensation=c
Rate resumption=r


Old formula before 1909:
Maximum 300 points = (0.75-m) * 400 / 3 + (2.5-p) * 40 + (0.20-c) * 350 + (5.0-r) * 6

New formula after 1909:
Maximum 1000 points = (0.50-m) * 600 + (2.0-p) * 150 + (0.150-c) * 2000 + (2.5-r) * 40

Watches which successfully passed the tests were issued a Bulletin de Marche, certifying the results obtained. Watches which scored more than 2/3 of the available points were published by the Société des Arts until 1927, then by the Publications de l'Observatoire de Genève until 1968.