Unknown 20mm shells

[Tmine35]

Can anyone tell me what these 20mm HE-shells are? They most likely are post WW2. No markings and fuzes missing. Fuze threads are very large and very fine. Note steel driving bands.

 

[Falcon]

These shells look like they are for the 20 x 128 for the Oerlikon KAA cannon. I believe it was developed in the 1950s and may welll still be in use today. Other than that I can't help you.

 

[Tmine35]

Thanks for info, this could be it - we had a few guns in test use in Finland in 1960's.
Here a picture of 2 other unidentified 20mm shells - any ideas?

 

[Falcon]

The top one looks like an APHCBC (Armour Piercing Hard Core Ballistic Capped) for something. The driving band looks similar to the Oerlikon KAA, but is copper.Other than that, I can't help you. What is the bottom one made of? It looks like solid brass or copper.

 

[Tmine35]

The lower one is machined out of solid copper.