Here's a grade 7 from 1952. Name not engraved in field on the bar. Fences different; No. 7 not scalloped. No engraving except band on barrels. The transition of your rib from square-shouldered to radiused [?] is not the appearance of the rib in this pic when it's a huge bitmap. I don't have the faintest notion what grade your gun is. Weiland's book shows a grade 12 w/ pierced toplever. I don't even know if that's typical or a hors de categorie flourish for a special customer.

jack