I've seen a lot of 7j and 15j watches listed from early 1900s (not RR movements) that people list as running perfect but upon inquiry are off by about 2 min a day. My questions are:
1) is this within spec for the watch or a product of its age?
2) are these likely to improve with a servicing?
3) should I be worried just like the watches from india that are "serviced" yet unregulatable at +2-3 min because they are cobbled together by amateurs from a bucket of broken watches?
I don't mind it being so off if that is normal, I just didn't want to spend money on something that should send up red flags.