25 x 159 (?) French round, help please

[Mrfuze]

Hello,
I got this 25mm French round, case length is approx 159mm, headstamp says:
" 25 1935-1937A LU 4 12 37 ", primer stampings: " SFM 110 34A 534 "
Can anybody tell me for what gun this is or other background info.
Is this a rare round? (I see it the 1st time!)
Mrfuze, USA

 

[Tony Williams]

Yes, it's rare. There's a drawing of it plus some information in
Flying Guns World War 2: Development of Aircraft Guns, Ammunition and Installations 1933-45 by Emmanuel Gustin and myself.

It was one result of a series of naval projects by DTAN between 1933-40. It fired 280-300g projectiles at 780-830 m/s. The DTAN Model 1935 gun which fired it weighed 80 kg and fired at 350 rpm. Three guns were made.

 

[Hoeksel]

Wow, very nice round!!! Never seen before.....

 

[Mrfuze]

Thanks a lot for your info, that helps.
For all of interest, I would trade this round against fuzes or Russian ordnance, I don't have! (contact mtifuze@yahoo.com)
Mrfuze, USA

 

[Grenademan2005]

A one of a kind!