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JAP lot code on American Projectile Fuze

jvollenberg

jvollenberg

Well-Known Member
Ordnance approved
Does anyone know what JAP stand for on an American Projectile fuze ... Specifically the M564?

I don't have any pictures, but researching the orgin of this fuze, I cannot find any American LOT code for JAP. I am suspecting this might be a foreign manufactured fuze that is marked exactly like a US version.

The complete LOT code is:

JAP1-6 1981

Thanks for any help,

Joe
 
No ... just a e-mail about it. I was assuming it was US but after looking through the US manuals I can't find the code. So I thought someone here might know something. Maybe an export code.

Joe
 
I have the brass remains of some No 221 time combustion fuzes used with 25 Pr smoke shell that have JAP marked on the top time ring as part of the filled lot number, so I'm wondering if JAP was a British manufacturer. From memory the dates are around 1941 to 1943. I will check more thoroughly when I get time. Wartime stampings on the 221 were much less sharp than the pre-war stampings, maybe to save production costs.
 
In my books Joliet army ammunition plant-Joliet- ILINOIS USA was JA not JAP.

MIL-HDBK-1461A1 April 1999SUPERSEDINGMIL-HDBK-1461​
15 January 1998


Joe
 

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I was think Joilet too until I looked it up in the same Mil HDBK. Lookslike it was made in 81, maybe Korean, but just a guess right now
 
AMMOTECHXT said:
I have the brass remains of some No 221 time combustion fuzes used with 25 Pr smoke shell that have JAP marked on the top time ring as part of the filled lot number, so I'm wondering if JAP was a British manufacturer. From memory the dates are around 1941 to 1943. I will check more thoroughly when I get time. Wartime stampings on the 221 were much less sharp than the pre-war stampings, maybe to save production costs.
Click to expand...

Ammotext your British fuzes marked JAP are J.A.Prestwich of tottenham london probably better known for there motorcycles
 
Its possible then that this fuze could have been made in the UK then? US fuze made in England not out of the realm of possibilites.

Joe
 
So to continue this discussion ... I now have a M557 fuze that has the lot code JAP found on the fuze / Booster / and on the shipping container. Inside the shipping container was a desicant bag from Belgium all made in the 80's. Again ... no images. All I have is the information. So thus far we have JAP (the lot code) being made in England. Any other ideas out there?

Joe
 
My only experience of the M557 fuze was in the early 1980s. All I remember of it was that it was a US design and I was under the impression that they were only made in the US. As an aside, it had a handling constraint in that it was `not to be rolled in excess of 6 mph' otherwise it could be armed. I guess that was imposed for the odd incident where fuzes or fuzed shell might fall from a trailer in transit.
 
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