20x102mm question


#1

I picked this up at SLICS this year. My question is would this be one of the earliest headstamps for this caliber? Is this a common headstamp or a hard to find one? I seem to remember reading somewhere that the 20x102 was developed in 1952.

Thanks
Zac


#2

Hi Zac,

The first “20x102” i have in my collection is a .60 cal case, necked out to 20mm with a reworked 20x110 projectile.
it has a reworked M99 and T61E1 marked projectile, with HS ’ * F A * 48 ’ .
(you can see some detail pictures here: http://212.178.67.161/ftp/20mmcollector/20mm/EXP/20_102_T61E1_M99_projectile_AGS.pdf )

I had never seen an ‘LC 52’ Headstamp, but it might indeed be one of the early standarized production cases.

Geert.


#3

Bits of Lake City Army Ammunition Plant history relating to 20mm production circa early 1950’s:

From The World War II Ordnance Department’s Government-Owned Contractor-Operated (GOCO) Industrial Facilities: Lake City Army Ammunition Plant Historic Investigation (1995 – 1996):

The M505 fuze mentioned above was used with HE/HEI projectiles intended for the 20 x 102mm cartridge.

Brian


#4

Thanks guys.