DVM, with this particular knife, the only apparant differences between it and the stock 152OT are the ones in that picture, the unique tangstamp, the etch, and the blade steel the etch and stamp indicate. The only other 152 pattern knives with the SCHRADE+ stamp (denoting stainless steel) are the Uncle Henry series. These two knives were, we think, marketing experiments to see if the public would accept stainless Old Timers. Evidently the experiment was cancelled before it went very far. That they were not goofs is made apparant by the specially printed boxes, and the fact that they actually wound up in the retail market in the early nineties, not as "end of days", or "factory finds". The 512 has the same sawcut Delrin handle, shield, grind, and profile as the regular 152OT. Later, in the late '90s, Schrade did a running changeover to stainless steel on most of the Old Timer lines. Eventually, they changed the Sharpfinger to a hollow ground blade, so the 512OT does not share this change with most of the stainless 152OTs. As I said, it is a rarity. Keep an eye open for them. Mine provenanced to the original buyer in late 1989-1990, and it was in the stock tan box. It was sold as a 152OT to him, and he just put it away until I bought it. Another was touted to be an error.
Incidentally, I did later acquire a NOS proper box for the 512OT which is a match to the style of the one for the 19OT. The box is copyrighted 1991, and the tangstamp order drawing was dated September, 1990.
Codger
