I was looking at a friends shotgun yesterday to see if I could help identify it. There are no markings on the barrel or frame. I broke it down and found J. J. Co. on one side and NYC on the other side of the locking lugs. There is also a serial number? of 007XXX.

I need help. All I find is a company in Spain called Victor Sarasqueta.
Thanks,
Russ

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US Veteran 1970-1974

J.J. Co might be 'John Jovino Co.' New York City. A very well known firearms importer. Probably known more for their military surplus arms imports than sporting arms.
Any proof marks on the bbls or receiver may give a better indication of where it was actually made.