Ladies 1968 Constellation Automatic power reserve advice.

Good morning OF.

I bought a 1968 Ladies Constellation 568.001 (With automatic 682 movement), and had it serviced at the end of 2021 by a very reputable watchmaker, recommended by many on this forum. The service has a 12 month guarantee.

My Girlfriend doesn’t wear the watch daily, but perhaps every other day, which means the watch is left idle for over a couple of days every so often.

I have read the threads on here about giving automatics a jump start with a few winds if they are picked up and are not running.

if the watch has stopped, I usually give it 30/40 winds (to fully wind the main spring) and it will keep time all day, however when it is left over night for 8 hours or so, I will find it has stopped in the morning.

The watch was worn yesterday evening for 5/6 hours and placed on my watch winder overnight as an experiment. I have just looked at it and note it has lost 15 minutes over night, but is still running.

Before I contact the watch maker, to discuss sending it back for a check up, what are the sure fire ways of testing the power reserve and time keeping?

What power reserve can I expect from a ladies
Automatic, do they generally stop if left overnight, due to the smaller (I’m guessing) main spring?

How many manual winds should I use to ensure the watch is fully wound before I try and measure the power reserve?

I was planning to fully wind it, get her to wear it for a day, check the time it is taking off in the evening, and check in the morning to see what time it stopped (if not still running).

Thanks for any help offered.

I have 620 and 625 watches, and when fully wind, they last the reported 40 hours, basically close to 2 days - for healthy Omega's, wearing them for an hour makes them last at least a day for me, with other brand watches I experienced the paranoia you experienced, but healthy Omega's make automatic worth it

I can't directly comment on a 682 and it's automatic performance, whatever I say would be speculation, but my personal opinion, automatic winders was just a gimmick, you can always get the bridge/winder removed, buy a 620/625 for cheap, and get it's barrel installed in the 682 and turn it into a manual winding watch with a non-slip barrel, easiest solution

Let's wait and see if there's an actual 682 user among us, some mens' watches have it too

I have a 681 and two 684s. They last for at least a day and a half (~36 hours) after being fully wound.

Are you sure your watch winder was set correctly for that watch?