It's definitely STL 8 but I don't know which sub-model it is. STL 8s were made in an A-G series or more. You can see STL 8, STL 8 C and STL 8 G pics on google HERE. The company just used a different wood design on the butt sections but I don't know if they use any other modifications like different color veneers. The pin is exclusely from 1993 and has been referred to as an Acme pin. Another view of a pin like this can be seen HERE with credit to go to Slim Limpy for taking the nice pics.