As above, the first version of the Recon Tanto was a cheaper version of the regular tanto. The blade wasn't highly polished and had a subdued finish on it, and the pommel was more rounded than the "skull crusher!" they liked to talk about. If you compare the picture of my Recon Tanto in post 33 to the pictures in the CS mags, you'll see the difference in pommels.
Also, it's my understanding that all the brass furniture tantos had 5-3/4" blades. At some point between the 88 catalog, and the next one I have seen, the 93-94 one, CS went to both a 6" blade, and stainless steel furniture. Now there were a few 5-3/4" blades with stainless furniture - the Special Ops one I have, and the Imperial version.
Also, it's my understanding that all the brass furniture tantos had 5-3/4" blades. At some point between the 88 catalog, and the next one I have seen, the 93-94 one, CS went to both a 6" blade, and stainless steel furniture. Now there were a few 5-3/4" blades with stainless furniture - the Special Ops one I have, and the Imperial version.