Steel cased double culot rimfire

General Ammunition Discussion
#1

Here is a 6mm/22 Double Culot I picked up at SLICS. I appears pretty normal except the base is brass plated steel rather than the normal solid brass (attracted to a magnet). Are there any other steel based double Culots cartridges? Also any idea when this was manufactured?
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Thanks,

Paul

#2

I think, this .22 Double Culot (not 6mm) was made by NCS, France
but I am away from my books…
PP

#3

yes you are right, NCS is for Nouvelle Cartoucherie de Survillier.
Normally branded “Concorde”.

#4

Thanks guys

Any idea when NCS was in business? Also any guesses when this cartridge was manufactured?

Paul