Firing Pin N-S or S-N

[painter777]

Looking at a GB auction.
I'm in need of a Stan Pro FP.
My books, CCNL's and quick search doesn't return results.

Did see a S-N or N-S Type I come out of a US&S NPM, thought to be a original carbine.

EDIT: Top Picture is a Type II: Anyone have any info on these ?



EDIT: Bottom: Another marked different, That I believe is a Type I -

Information

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[Bruce McAskill]

Charlie, I have seen the N-S pin before but just in a group of assorted firing pins. Like you I cannot find anything listed as to who made them. Merry Christmas to all of yours.

[USGI]

Saw a couple of those a day or two ago on GB or eBay. One seller had his listed as made by NCR. I believe the other guy thought NPM made it for Std Pro. I didn't take time to check any books. Also one was listed as being made by Commercial Controls - thought that might be possible? - Bob

[ssgross]

I read the subject of the thread and immediately thought the question was whether the stamp should be read as NS or SN. Should it should be NS for nickel steel? Students always ask me why the natural logarithm is always ln and not nl - to which the reply is always that not every smart person in the history of the world spoke or speaks English.
The top picture looks like it reads NS, as the top curl on the S looks slightly smaller - kind of like a 5 is no longer a 5 when upside down. Sorry I can't help you with the part, but maybe I saved you the trouble of typing the extra "or SN" in the future...unless I'm completely wrong in which case I'll learn something new, and thanks in advance!