I just bought a 6254 on eBay. It was stated as carbon steel but turned to be ss. Great- my fav anyway but one thing I don’t understand- clip blade is ss but spey blade is ssp. What is the p for? This probably an ‘81 I believe. Any help is appreciated. Ldp
"SSP" is a designation that Case used to use for some stainless steel knives. These were stainless knives that had blades with a "glazed" finish and the blade edges were final sharpened by "polishing" on a pumice-coated wheel...so "SSP" meant "Stainless Steel with Polished edge".
The "SSP" was only used as part of the pattern number, not the tang stamp.
Steve Pfeiffer, author of Collecting Case Knives: Identification and Price Guide second edition released November, 2015.