Need I.D. and info on this Case

It is similar to a 386 (225256)
http://www.xxcutlery.com/detail.aspx?ID=175

Now if you have the numbers of it, one can better tell the actual handle, pattern number and type of steel, as Case uses a numbering system.

All About Pocket Knives is a great site.
http://www.allaboutpocketknives.com/

Handle material here:
http://www.allaboutpocketknives.com/wr_case/about_case_knives/handle_material.php

My guess is Stag which means the number 5 in the numbering system.

The CASE - XX - USA stamp was started in 1965.

It is a 523-5" and there should be a letter stamped on the reverse tang indicating when it was made.

An L would be chrome between 1965 - 1974.
Or it could also be a stainless 523-5-SSP made 1972-1988.

Value is not high, as it is a used knife.
In perfect unused condition, it might be a $100 knife.

rc

rcmodel nailed it!

If it were my grandfather's, sentimental value would trump book value hands down.

It is a nice knife, I would enjoy it and any memories it has with it.

Good looking CASE. Keep it an use it well!