2 x M8137 CV4004 Mullard Valves Box Anodes Matching Codes NOS Tested

2 x M8137 CV4004 Mullard Valves Box Anodes Matching Codes NOS Tested
2 x M8137 CV4004 Mullard Valves Box Anodes Matching Codes NOS Tested
2 x M8137 CV4004 Mullard Valves Box Anodes Matching Codes NOS Tested

2 x M8137 CV4004 Mullard Valves Box Anodes Matching Codes NOS Tested
2 x M8137 CV4004 Mullard Valves. Old Mullard logo and M8137 print.

Large single support halo getters. Matching 641 R9F3 batch codes. Test as a quite close electrically matched pair.

Results are shown on the valves.
2 x M8137 CV4004 Mullard Valves Box Anodes Matching Codes NOS Tested