Originally Posted by tmitch
A Lyman 66LA will work also.
http://www.lymanproducts.com/lyman/sights/66-receiver-peep.php

If you want simalar vintage to your rifle, the Lyman 56LA was made for the 336 Marlin till the late '50s when the 66 was introduced


Thanks, this vintage sight information is very helpful. I am indeed trying to match the vintage of the rifle if possible.

dave