[quote author=JV Puleo
If the two marks are "crown over GP" and "Crown over V" they are London proofs... keeping in mind that the GP is a ligature - the two letters are joined together.
The crowned "GP and "P" marks are frequently confused, were intended to be confusing at the time and are still confusing people now. Also, on a worn barrel, they can be difficult to differentiate.
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Puelo , You are correct . It's difficult to tell if they are joined or not. They appear to be joined but I'm not 100 %.
The word London is not stamped on the barrel like the trade guns . That would have been to easy.
Rambling Historian Thanks for those pictures that's what I needed.
Mike I always thought this was a reused barrel . I hadn't thought about it being imported new. It does make a pretty neat light weight gun. Here are a couple pictures of the lock for those interested .
Thank you all for your help. JIM