Help 20mm projectile

Hello, would anyone know what caliber this projectile silver projectile and copper forcing band belongs to?
Thank you

IMG_5254-1

IMG_5253-1
1º 20x139 - 2º 20x128 - 20x110 HS - 3º. ?

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It should be a Swiss 20x110 TP.

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Thanks EOD, date, do you have any information, documentation or image?
20x110 HS?

Hasag, yes 20x110 HS of course.

There is little Swiss documents out.
I have nothing on hand to show but Silver was used for quite a while on Swiss medium caliber ammunition to indicate TP or “inert” projectiles.

Thank you very much for your answers and interest EOD.