Jim, I can see why your chip could have seen more table play before being discovered, only the denominations are really different. But with Jerry's, because both sides are quite different, it seems to me it would have been much more noticeable. Also, but because of the poor quality of the photos/scanes it's hard to really tell, it appears that Jerry's chip has really worn edges, which indicates an awful lot of table play.
Would be nice to see better photos ... I don't know .... just seems strange for Harvey's to not have noticed that chip before it got so worn. Again, very curious!