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We need a make of derringer.
I was told by a gun collector that a five digit number on an imported derringer is not a serial number- it is a lot number ( a serial number should be at least 6 digits) what about the proof markings on the gun? can this identify the company or date or just the country of origin?
No known sn data; 50 USD
25-50 dollars
No way to answer without a make and model. Serial numbers aren't unique to one firearm.
Impossible to answer without knowing the model and who made it.
Yes, many have been made in 38 Special
No public database- sorry.
Only what someone is willing to pay !
100 or so
No way to answer without a serial number and complete description
You don't provide a serial number.