Old stock. The tubes are new and never used
"Reflektor" factory
Military rhombus
Date Code - from 1987's
Tested and Measured Pair 6P3S-E (6П3С-Е) Tetrode
We test our tubes from this type on High-End Military Tube Tester: L3-3
Measured parameters attached to each tube, difference < 3%
on the photo shows an example of tubes with parameters,
if you need actual date codes and parameters - please ask
Lot of 4 (Matched & Balanced Pair)