Matched codes, perfectly balanced, tested full NOS. Calibrated TV7-D/U test results: 59/60, 60/60. (Minimum/Good range on the TV7 is 40)
Philips 5AR4/GZ34 Rectifier – DD-Getter – f32 X9F – 1959 Holland – Very Strong
Location/Date code X9F (visible on glass – see pics): X is Sittard Holland Factory, 9 is 1959, and F is June. The batch code, location/date code, tube construction, and specifications verify its identity.