As was stated above, it is not a KODIAK, but a KODIAK HUNTER. It is a second year model 1968, although they were cheaper than the SUPER KODIAK, they are still great shooters, and for some very collectible. THe '67 is the most collectible since it was the first year model.
I wil lbe surprized if that sight is glued on, prbably just screwed on. Once you remove it you will have two unsightly drill holes. If you want to make them look better, install some of the brass inserts that are available from 3 Rivers Archery. You may never put a sight on again, but in my opinion it looks better than two bare holes.
If there is glue, acetone works well and usually will not hurt hte original finish.