[camaromb]

There certainly are variations in stampings on the production YH wheels but there are also a few consistant characteristics. The K-1-9 appears to be stamped in a gang holder, the edge can be seen on the 8 6 stamping. The dates and application (YH) seem to have been stamped as individual characters with varying depths. The only wheels without the dash between the K-1-9 I have seen are the august '69 dated wheels. Who knows why they used a different gang holder set? Later '69 dated wheels also exhibit the dashes between characters. Other than the fact that the E-Bay wheels don't exhibit the gang holder stamp characteristics, have different fonts on the Y and H characters than other original YH wheels, no dashes between K-1-9 characters, and have (rare?) March '69 dates; they seem quite like regular production YH wheels! A lot of money for some "unique" YH wheels!
Mark