Mullard CV4086 - MINT NOS NIB 1961-62 Prem. Grade Long Life EF86 EF806S 6267 CV2901 CV4085 M8195 Solid Shield Wrinkle Glass Halo Mullard Mitcham Prod. Haltron LBL - Gt. Britain (Plug and Play Ready to Use) Plug pins are exact size

Plug pins are exact size of a typical NOS OCTAL tube for snug fit

These tubes are one of a kind

Not surprising since BEL was one of the Philips/Mullard OEM plants in India setup with TOT (Transfer of Technology) from Philips

Other noteworthy mentions

Mullard CV4086 - MINT NOS NIB 1961-62 Prem. Grade Long Life EF86 EF806S 6267 CV2901 CV4085 M8195 Solid Shield Wrinkle Glass Halo Mullard Mitcham Prod. Haltron LBL - Gt. Britain (Plug and Play Ready to Use) Plug pins are exact sizeBrand New MINT NOS NIB Rare 1961 62 Mullard CV4086 Military tubes Haltron Label. CV4086 Flying Lead is Premium Grade, High Reliability Long Life version of EF86 EF806S 6267 CV2901 CV4085 M8195 valves. (Click Here to read about Flying Leads Valves). Mitcham Production, identical to these (click here) except these were relabeled and boxed by Haltron in 1986. Date codes on some early Mitcham Flying leads types were painted on and not etched v s tubes