Here is a Dynaco pull, a Euro 5AR4 tube labeled "Dynaco Made in Gt Britain".

Has code "1022-???" on glass

Uses old style flat straight edged plates and single top halo getter.

Getter flash shows light or proper voltage use, just some rainbowing at the edge.

2 Euro style seams across the top of the glass, one bold, other not so.

Tested NOS on AT1000 tester: A= fwd 3v/rev 404V, B= fwd 4v/rev 404V

Ready for use.