looking for info re: wooden ammo crate

[hutchster]

i purchased a wooden ammunition crate from a local classified website and am curious if anyone knows or better yet has a pic or link to a pic of what it was used for.

it is about 32" long x 12" wide, 7" tall and is labeled with "ammunition for cannon with explosive projectiles"

the side is labeled "2 shell HE m329 w/suppl chg" and under that it says "fuze pd m51a5.05 sec delay"

followed by "42 inch mortar" and a "loaded 8-53" stamp

it also has "R40FA" printed in multiple spots on the chest.

any info would be greatly appreciated

thanks
hutchster

 

[Mk VII]

It's high explosive shells for the 4.2" Mortar, used in WW2 and Korea. M329 Cartridge is it's official name. Point Detonating Fuze M51A5 is a selective, superquick or 0.05 second delay impact
fuze used to detonate HE ammunition in this and many other projectiles. See TM 43-0001-28. A deep fuze-well in the nose is fitted with a supplementary charge of TNT; this charge is removed to accommodate deep-intrusion proximity fuzes.