Re-stamp part #??

[Mike]

I recently picked up a Quadrajet carb for my car that I thought was an un-restored original carb. The part # stamping seems odd because their are two different type 2's stamped into the part number. I was wondering if the numbers were gang stamped or individually stamped at the factory? Anybody know? The carb looks like it has never been rebuilt, never replated and there is no evidence at all of any sanding or grinding of the area where someone would have tried to restamp it?? The depth of the stamp is pretty consistant as well will the exception of the "7" which seems to be correct compared to other carbs I've seen.

What do you guys think? Anybody ever see this before? It's a pretty rare carb and by the condition of it seems to be original.

Thanks,
Mike