Dr No
[Moderator Omega - Wristscan]
37520
Is there a reason for the rate stability . . .
. . . for the GO cal 39? I've owned five cal 39's [and currently own four] - all seem to exhibit little if any drift in performance over time. My first GO was a 2001 Karree chrono [regretably sold] that was literally perfect out of the box, and in one extended 18 week timing period gained precisely 60 seconds. The second cal 39 is a 2001 'power reserve display' that was consistently fast @ 2'15" (+/- a few seconds) per week for almost three years; when I got it back from service in December I recorded a gain of 1'1" in one week, and I just logged in a gain of 1'3" - essentially unchanged.
My next two cal 39's are Karree perpetuals (2003 & 2004), so timing is more of a speculative matter (no seconds hand), but they both seem to share the stability of the first pair: one is ~ .5' +, the other ~ 1' - per week. The fifth cal 39, a Senator perpetual purchased in March, is running 1'10" + per week consistently. My question for Marcus: is there a technical reason inherent in the design of the cal 39 that accounts for the consistency I've experienced? I've had other watches that exhibit a degree of drift in rate stability over time. Just wondering. Cordially, Art