Don't ask the qoestion if you don't want the answer .
There is another"stainless" 19-3 currently on G.B.
I'm sorry but I have to.
It took us 84 posts to get to this point-what cold blue to buy?
Bruce
Through direct observation, I learned that Birchwood and Casey cold blue turns bare carbon steel blue.
I also discovered that my fingers did NOT turn blue, even when exposed to cold blue. Therefore, I am stainless steel! I must be mis-marked from the factory.
I have a Stainless Model 25, and Model 547, and the material analyses to Stainless. Yes the factory says Blue, but I'm sorry they are 100% Stainless. Roy saw them, and he only goes by factory letters.
That Model 19 is most likely stainless, you need to go to a company that buys gold and has a $5000 machine that can analyze and give you the results.