Soviet Primer ?

[Weasel]

I have these two pictures of what i believe to be a primer for a large Soviet case, is anyone able to identify it for me and tell me what case it was used in.
Thank you in advance, Weasel

 

[Alpini]

It's a french type percussion primer for bag charges of larger guns. I don't know for which russian gun exactly but normally >= 155mm.

 

[Nabob]

GTK-2 igniter

 

[Weasel]

Thank you very much Alpini and Nabob for your replies, I know next to nothing about Soviet ordnance.
Best Weasel