Magazine 10-RD Hi-Standard HD

Caliber .22lr, pistol High Standard model A, HA, D, HD, E, HE Military, magazine 10/ten cartridges metal black, cartridge feed button small, new production code 212M Triple K USA.
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Note from Triple K:
MODEL A – .22lr, barrel 4.5 inches or 6.75 inches, black with adjustable sights, without hammer.
7,300 pieces were produced from 1938 to 1942.
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MODEL HA - Modification of model A with visible hammer and lighter barrel.
Approximately 1,000 pieces were manufactured from 1940 to 1942.
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MODEL D - Essentially identical to model A, only with a heavier barrel.
Approximately 2,500 pieces were manufactured from 1938 to 1942.
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MODEL HD - Like model D, with visible hammer and without side safety.
About 7,000 pieces were produced from 1940 to 1949.
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MODEL HD-USA - Corresponds to model HD, but features a thumb safety, a heavy barrel, parkerized finish, and the marking "Property of the USA."
Approximately 44,000 pieces were produced from 1943 to 1946.
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MODEL HD MILITARY - Corresponds to model HD with thumb safety.
Approximately 150,000 pieces were produced from 1946 to 1955.
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MODEL E - Corresponds to model A, but with significantly more handwork, heavy barrel, and thumb rests.
Approximately 2,500 pieces were produced from 1938 to 1942.
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MODEL HE - An E model with visible hammer.
Approximately 1,000 pieces were produced from 1940 to 1942.