This Remington manufactured 11 5/8" long outer magazine tube is for the model 12-A slide action rimfire rifle in 22 S, L, & LR caliber. The overall condition is very good exhibiting a brownish gray patina with a few specks of rust.  (file photo)

Note: Remington model 12-A takedown slide action rimfire rifles with the following serial numbers have been observed with this part:

12-A: (3867, 100823,?) 374065, 570191, 741138, 802984 & 806842