I apologies for a beginner’s question; the 23j Vanguard that I just acquired is gaining far more than it ought to - around four minutes a day.
The regulator is about in the middle. It did not start right away but did so after about four winds and a twist, as one does with a chronometer.
I am unwilling to start tinkering.
My experience with verge watches is that excessive gaining is a sign that a watch needs a clean and re-oiling. Is that the case here?
Serial number is 33371840