Update: sample to test this and other tubes:

https://www.ebay.com/itm/314669486662

LND 71322 Geiger-Muller tube

made in USA

In set:

 1x LND-71322 beta-gamma detector

Used, tested, fully working and in spec.

datasheet:

https://www.lndinc.com/products/geiger-mueller-tubes/71322/

Shipped in safe package, with tracking number, from EU.