How accurate should a vintage watch be keeping time?
One question I am consistantly asked when selling vintage watches is 'Does it keep good time?. This question is a difficult one to asnwer without knwing that person's definition of 'good time'. If you were to buy a new chronometer rated wristwatch, this should 100% keep time to well within the COSC specifications. If however your watch is not a chronometer there does not appear to be a strict +or - tolerance for which to measure against, therefore whether a watch keeps good o