MULLARD CV4035 M8214 - MINT NOS NIB 1961 Mil Box Plate Prem Grade Long Life M8137 ECC83 CV4004 12AX7 Wrinkle Glass Halo Getter Whyteleafe Prod. Dual Logo Old Shield and CV - Gt. Britain (Plug&Play Ready to Use) - M. Pairs/Quads/Singles Another hand written serial number

Another hand written serial number on the side and text PM25525-1

STC Rochester Plant Date Codes are faint and painted on instead of etching in some of the earlier Brimar flying lead type

it strikes a balance of midrange warmth

The BEL ECC88 should be a top consideration for any 6922/6DJ8/E88CC/ECC88 tube amp

These will be shipped in plain white new generic boxes

MULLARD CV4035 M8214 - MINT NOS NIB 1961 Mil Box Plate Prem Grade Long Life M8137 ECC83 CV4004 12AX7 Wrinkle Glass Halo Getter Whyteleafe Prod. Dual Logo Old Shield and CV - Gt. Britain (Plug&Play Ready to Use) - M. Pairs/Quads/Singles Another hand written serial numberBrand New, MINT NOS NIB Rare 1961 Mullard CV4035 M8214 Box Plate Wrinkle Glass Military production. Tubes have Dual Logos, Old Shield M8214 in front and CV4035 on the back. S. I. D, R. E. M. E Donnington stock. CV4035 M8214 Flying Lead is a Premium Grade, High Reliability Long Life version of M8137 CV4004 ECC83 12AX7 valves (Click Here). All tubes from the same 1961 date batch code AG0 H133* (H=square with a left diagonal line in center) from Mullard