Could this incorrectly riveted bridle be the cause of poor amplitude
About a year and a half ago I serviced an ETA 2804-2 movement in good condition but in need of service (my service walkthrough here). I haven't worn the watch much since then as it didn't seem to keep time very well. When I measured the amplitude a few days ago with the mainspring fully wound, I got an amplitude of about 260 degrees (dial-up), but already after 24 hours, the amplitude had dropped to about 130 degrees. I also got the impression that the rate can vary greatly even with the mainspr
I'm sorry to have kept you in agony for this long which must have given you many sleepless nights, but finally, to my great joy, I have identified and fixed the source of the low amplitude issue, resulting in excellent improvements. 🙂
Upon close inspection (40X magnification) I found some very slight rust and oxidation on several of the train wheel pivots. Don't know how I missed that when I serviced the movement the first time around (really a bit embarrassing). Perhaps I simply wasn't lo
