Well, the marks are mixed. I can't remember which proof-facility uses >>CHOK<< to designate choke nor which proof-facility uses kilo-pond(pondus) for weight but the tubeset should weight 1212kp. I'll ponder on those choke numbers and what I think to be a proof date of 10.1973 below the W surmounted by a Crown(spangled M)?

Cheers,

Raimey
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