A few weeks back I picked up an Alpiner 4 GMT which contains the Sellita SW200 movement which FC/Alpina modifies to add the GMT complication. As this is my first automatic, I have some questions about power reserve and time loss.
What I’m seeing is that when I had wind the watch after it has stopped (several days without wear), it keeps good time, losing 2-3 seconds for the first couple days of continuous wearing. However, on days 3/4/5, the watch will accelerate the time loss to ~30 seconds, then ~45 seconds, and by the end of the week I’m several minutes behind.
If I give the watch a fresh charge by hand winding, it’s accurate to 2-3 seconds again but the cycle repeats.
Does this indicate that the watch isn’t getting enough movement/recharge on its own? I work a desk job and don’t move a lot with it on while at work.
I assumed that as long as the watch is running it would keep the same time accuracy of 2-3 seconds per day. However now I’m thinking as the watch is slowly discharging energy it’s time loss accelerates?
Interested in any thoughts or feedback you can offer on what I’ve described.