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40mm Bofors Stamps ID

The encircled 12 denotes the nominal time in seconds to self destruction when fitted with a S.D. tracer.

FNH/P This nomenclature was adopted in by the British for Hercules and Dupont flashless cannon powders especially produced to meet a British requirement in 1940. FNH “Flashless, non-hydroscopic”

AG/C - The maker of the case – Aluminium Goods Co., Ltd. Toronto, Canada.

WBL/C - The maker of the primer - Wallaceburg Brass Ltd., Canada

SC/C – The filler of the primer - General Engineering Co. at Scarboro, Canada.

TimG
 
I believe FNH stands for Flashless Nonhygroscopic, meaning it doesn't absorb moisture. Hydroscopic is underwater.
 
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