This Japanese manufactured early variation rear sight base is for the Type 99 Arisaka bolt action rifle in 7.7 caliber and is in good condition exhibiting a brown patina with rust specks and moderate wear. The mounting screws are sold separately. (file photo)
Note: Japanese Type 99 Arisaka bolt action rifles with the following arsenals and / or serial numbers have been observed with this part: 16866 & 21908
Nagoya Arsenal: 40856