And what about this?

[Grenademan2005]

Teach me, please.

 

[pzgr40/42]

Miguel,

What are it's exact dimensions?
The headstamps look kinda Dutch, but I know nothing of any Dutch ordnance in this, approximate, calibre at that date.

greetz

Menno.

 

[HAZORD]

If it is 20mm it looks like the 20mm X 128 Oerlikon. Problems with this guess, is that the 20mm X 128 is typically a steel case round, and it was developed in the 50s.

What is the diameter of projo and length of case?

 

[Grenademan2005]

Hello:
It is not mine, but as I collect these rounds I need info for learn about.
23 x 122 mm Experimental HS 407.

 

[SG500]

Nice round, see link below for the one I have.
Dave.

http://www.bocn.co.uk/vbforum/23-x-122-t44832.html?t=44832&highlight=23x122

 

[Grenademan2005]

Hi Dave:
Then it is a round for a plane?

 

[SG500]

Hi Dave:
Then it is a round for a plane?

Yes, for a French aircraft gun.
Dave.

 

[Grenademan2005]

Humm, I only collect German Aircraft rounds, (MG151/20), so I will have to think on this. Thanks to all for the fast answers.