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Some smells is Ammonia or Camphor, more in this paper; JAIC 1991, Volume 30, Number 2, Article 3 (pp. 145 to 162)
(I did post the same link in this tread;...

I believe they are the originals too!
Then there is more than one type of celluloid... we should try get more info on how to check the different types and exactly how dangerous they are!

As some collectors never take anything out of the box I would put it back in there and go on pretending I still got a NOS razor in there! ;)
I actually didn't know it was that aggressive, some spot...

If you have more of them sell them to me! ;)
I did buy my Le Grelots on ebay.fr, really good prices but my french is not really that good, haha.

About the steel, I wouldn't trust it's "Sheffield...

355 I guess is some model number and 5/8 is the size of the blade, quite normal size.
Now go and hone those chips away and get her sharp, mine shaves like a dream!
I've just cleaned mine up quickly...

Nice find! :)
I've got one almost the same but with a worked spine.

118962

Mine don't have any number on the tang thou, what's the number on yours?