Space Marine Transition Collectors Guide

I've been collecting early Space Marines for years now, and the early 90's sculpts are some of my favorites. Recently I noticed a fair amount of material circulating on the boards regarding Marines from this time period, so I figured I'd get a collectors guide going.

Space Wolf Marine Commander

I first see this figure mentioned in the late summer 1989 Citadel Catalog found here at Stuff of Legends. It was later sold as Leman Russ.