Looking for any info- age, etc.

Just picked up this J Blanch & Son 16ga single barrel hammer gun, 28 inch damascus, Jones, rebounding lock. Weight 4lbs 13 oz.

No serial on frame, tiny number on barrel ahead of forend lug -21646 - seems very high for this to be serial#.

Bore is bad.


Nice Rigby flat


1855 address


London BP proofs, unknown crown over "S" - 2nd from bottom, inverted to the others.


Locking tabs on underlever



Very cute, and would love to know anything more about it.
Any Blanch experts?

Dumb, but learning...Prof Em, BSc(ME), CAE (FYI)