VU39 Cossor MU12 MU14 IW4 CV1039 quartet rectifiers black plate top side getter

Description

Quartet of Cossor ST fat shape indirectly heated audio rectifiers type VU39 used by the RAF Royal Air Force.

Black plate, ST fat shape with getter located on top side of each valve.

Theynall have the same shape and all come from the same batch.

All VU39 valves tested 100% in working order.