One dead giveaway is (if you can see the dial loose) a v shaped nick at the edge, I think the redials use this to align the dial in a jig.
Otherwise it is down to checking it with known correct dials from the same watch or era, checking alignment of script, checking for swiss or swiss made etc at the bottom and comparing the fonts from known "correct" to the "unknown" one.
If you are not sure post a scan.
Only problem with that is, particularly on here is that some of the posters really don't know what they are talking about yet post as "experts"
I am NOT an expert but know a few who certainly are and are generous with their advice.
God luck, C.
Click to expand...