ID 20 mm

[Yodamaster]

Who can help me with the ID of this 20 mm cartridge (nationality, manufacturer,...) ?

Marking of the shell :
- stamped : 23-U
- stencilled : 5n/52
Color of the shell : red-yellow

Marking of the fuze :
- stamped : HS 171 52 (probably Hispano-Suiza)
Color of the fuze : blue

Marking of the case :
- stamped : 52 A 261 D




Yoda

 

[Falcon]

I believe this is Swiss.

As far as I know, "D A" means Case made by the Altdorf Factory with brass supplied by Dornach factory. "52" is the year and "261" is the lot number.

I could be wrong here, if any posters can correct my answer then feel free.

 

[EOD]

The case is Swiss but the projectile markings say it was not for the Swiss military if so.
Swiss cases show up regularily on exported ammunition and also on components exported separately.

 

[Yodamaster]

Thanks Falcon and EOD,

that's a very good beginning !

Have you more details on the, I think it is, model 23-U of shell ? Incendiary, explosive, practice,...?



Yoda

 

[Tony Williams]

Red and yellow usually mean HEI in the west, but there are no universal rules applying to this.

 

[EOD]

Yoda, these export hybrids in 20x110 HS are a pain when it comes to ID.