Hey guys. Briefly: my new USED Zenith Rainbow Elite 670 diver watch gained <0.5 sec in 8.5 hours when I didnt wear it. It was placed dial up on a table.
BUT when I wore it for 8.5 hours (using the computer, driving a car etc.) it gained 4 seconds already.
Anything I can do to make it run faster or should it be regulated?