Tony.A.[GO Moderator]
2638
Some info.
Aug 15, 2021,14:19 PM
Every Senator Chronometer is individually tested in the astronomical
observatory of Glashütte.
Find this info:
This German standard is similar to ISO 3159 that forms the basis for
COSC certification.
Watches are tested for compliance with DIN 8319 at Glashütte
Observatory. The DIN 8319 procedure requires 15 days of testing, in the
same
positions
as for COSC (dial up, dial down, crown left, crown on top, crown
below), with an average daily rate variation between -4 and +6 seconds.
Average daily rate deviation must not exceed 2 seconds, and largest rate
deviation must not exceed 5 seconds. Watches are tested at 23°C, 8°C
and 38°C. Watches are wound once every 24 hours. On the tenth day of
testing, any complications (typically a chronograph) are activated to
ensure that they do not detrimentally affect precision.