Need help identifying this shell

[3volv3]

Good evening everyone, I have two 20mm shells I need some help in identifying please.

I will post them separately, I believe both to be anti air 20mm rounds.
Thank you for looking

Here is the first one, a 20x138mm.

[Jb4046]

Hi

I think this a 20X139MM casing for a modern 20mm gun

Hispano-Suiza HS.820 - Wikipedia

But some has a put a old 20mm Hispano dummy projectile on it? Any markings on the projectile

[3volv3]

I have asked the seller if there are any markings on the projectile. Is he replies I will share it here.

Thank you for your information

[3volv3]

Projectile is marked J.D.K on the side