By SS825, I assume that you mean the 825 stockman, stainless steel blades. That's the closest one I can find in my 1963 Schrade Walden catalog.
In this older catalog, it was listed and pictured as the #825RB, the "RB" meant "Razor Blade" Stainless. This was apparently the first use of this particular stainless steel formulation, with satin finished blades and special "razor edge" honing.
The specifications are listed as follows:
No. 825 RB
"Razor Blade Stainless"
Slim Premium Stock
3-9/16" long
Turkish Clip, Sheepfoot, and Spey blades.
Unbreakable Staglon Handle
Weight per assortment (3 knives) 1 pound, 4 ounces
This was problaby the first time that this knife was produced with the "Razor Blade" Stainless blades. The catalog indicates that the knives would not be available until 1965.
They were available in a cardboard display box with 3 knives, each in an individual plastic flip-top box. The display incorporates the picture of a man shaving with the words:
NEW
Razor Blade Stainless
Pocket Knives
Cuts Cleaner/Lasts Longer
Just Like Stainless Razor Blades!!!
There was also a smaller pattern available, the 855RB, similar pattern but 3-1/4" closed length with pen blade in place of sheepfoot.
Schrade may have been capitalizing on the (I believe) then recent introduction of stainless steel razor blades to the market in promoting the knives this way.
The retail price for the 825RB was $7.95. The same knife in carbon steel was the 895, which retailed for $5.35.
I think that the 825 was kept in the Schrade line until circa 1983, when the entrie "open stock" line was discontinued.
They have made the same pattern in the Uncle Henry line and it is still in production. Essentially the same knife but with imitation stag handles.