On auction I presume?
Interesting, from the pictures of the action & locks it looks to be British 1870’s -1880’s styling..
…….so a “.410” double rifle, I wonder if it was bored out smooth or if the auction house (if an auction) just used the description to mean an unknown .40 calibre?
“Henry Pielling” was perhaps a retailer?
- Mike

ADDED:
Ah hah, not Henry Peilling after all?
Found this from back in 2011, I’d opine that it has to be the same gun/rifle:
https://www.shotgunworld.com/threads/henrys-pielling.271537/

Would be quite revealing to see more and better pictures……action, locks, barrel flats, proof marks, barrel inscription.