I have a diver watch with a Soprod A10 that is a little over a year old. It's been running slow, in the beginning about 5 secs/day, but recently more like 20 secs/day slow. I thought I would open the case and turn the adjustment screw ever so slightly to see if I could get it more accurate. After carefully doing this, I find the balance stops when placed face down and on it's side. It seems to run well when the watch is placed with 12 O'Clock up. Then as you tilt the watch to the dial side down, it slowly comes to a stop as if it is not powered or as if there is some slight friction. Has anyone seen this behavior before, either in this movement or any other perhaps? I am reluctant to fully uncase it and try to troubleshoot it if there could be something simple I might have overlooked.