TEPPO WITH HEAVY BARREL NEED TRANSLATION

[Cerjak]

Two answers from Nihonto Message Board

"The numbers say 壬申 802.
This gun barrel was recorded in one of the Meiji general registration round-ups starting in 1873."

"Probably the famous first one in 1873, as that was a Jinshin 壬申 year.

Something like X治懸　in Imabari Ken, but the first character of the old name of the Prefecture eludes me. "