It is definitely a Mark II, says it right on the side of the action. Also has the wing safety, not Tang, and the stainless bolt handle, not blued like on the original M77. The red butt pad kinda throws me off, as those are usually on the original M77s and the Mark IIs usually have black pads. That and the bolt face configuration lead me to think it may be a very early Mark II. Maybe the Ruger CS got the year wrong? However, the original owner did claim to have purchased it in the '80s.
