Sako serial # are a disaster. In my experience a pre-72 (pre-Garcia) Finnbear, which is what I believe you are looking at, will have as stated a 3rd lug at the rear of the bolt, a higher polished blue, generally a lighter stock (your hand can easily encircle the pistol grip) and a lighter barrel (roughly .600" vs. .650" at muzzle) and a fixed sling mount, no swivel and most likely have a Bofors stamp. They will not have an importers mark on the barrel. I do believe their fit and finish is better. They can often shoot very well as can the newer rifles. Value is very dependent on the model, deluxe or standard and obviously condition.
