Jimmy, there is very little difference between a Custom Grade of the Custom Shop era and a #1 engraved round frame gun of the Custom Built era, maybe no difference at all. Another matter of confusion in identifying postwar guns without a Cody letter is the little known fact that, in the Custom Shop era, unengraved guns were not only available, they were catalogued for a very short period of time. I have a solicitation from the factory that offers an unengraved gun, identical to a Custom Grade except for the lack of engraving, for $7500, somewhat less than the Custom Grade of the time. A dealer's website has one of these offered for sale at this time. A rather scarce variation of our favorite Winchester.