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40mm 'Bofors' shell help


B.A.R.gunner
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B.A.R.gunner

went to the local indoor flea market yesterday, picked up this 40mm shell, no price but we asked the owner to call the guy who owned the booth, no one was home so he said, just give me $10 for it, seemed like a good deal to me. its dated February '45. I did have a couple questions on it though. I know its a 40mm MK2 AA shell, but there are some ink marks on the side US - 491, or UC - 491, would this been the ship it was on? i did a little research for a US - 491 ship, and only one picture with a ship with the 491 mark on it showed up, but no info on it. Anyone have any info on this ship? (if it really was one) and its dated february 1945, how quickly were these used? would they have just sat in a stockpile for months before being shot, or is there a chance it could have been fired at one of the islands invaded in February of '45, like Iwo Jima or Okinawa? ^_^

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Garandomatic

I think it's some sort of lot number for some aspect of the round that would be different from the lot number stamped into the headstamp. If it was a ship number, it'd be preceded by the designation for a ship, like DD, DE, AP, etc.

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El Bibliotecario

If thats a ship's number, it must be the USS CAINE--only Cpt Queeg would require stencliing the ship's number on every single round of ammunition.

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BARgunner

 

The MK 2 on the base is the US Navy’s designation of a case made of brass. I can not read the markings on the primer. For a USN case of that date, 2-45, the primer should be a Mk 22.

 

IIRC, the triangular shaped mark on the base is the manufacture.

 

If that was an US Army round (for that date) it would have the case and the complete round lot # stamped on the base.

 

Just a guess,, I think the lot number on the base is the case lot number and I am just not sure about the stenciling on the side of the case.

 

The Army shot up a lot of Navy 40-mm ammo in Viet Nam and I do not remember any thing stenciled on the side of the cases, could be I just don’t remember. I have a empty 40-mm steel case (MK 3) in my shop, in a.m. I will check if it has anything on its side.

 

45B20

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  • 8 years later...

Old thread I know, but I stumbled on it, posting ID on the case marking. Naval code UC means it was loaded with an AP round. UA would be HE, ....post-180924-0-09378600-1581436205_thumb.jpeg . Army cases are head stamped M25, Navy have the anchor. Army ones much harder to find.

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