EL-84 Recommendations

[ceylon]

Yes, BEL India had the V , PHILIPS Heerlen had the Δ (delta) , EI had a dot in a circle (I think).
Matsushita,BEL,EI were using Mullard tools so they all had seams on top of the glass (like Mullard and Philips) .

EI made tubes with telefunken tooling they bought from telefunken.

howd they use mullard tooling?

 

[Mr Boochie]

EI made tubes with telefunken tooling they bought from telefunken.

howd they use mullard tooling?

Ei must have had Philips tooling, too --- for some of their tubes.

 

[LP-THORN]

EI made tubes with telefunken tooling they bought from telefunken.

howd they use mullard tooling?

EI had tools from Telefunken and Philips/Mullard. Even their smooth plate 12AX7 had the seams , like their EL84's and Elite versions of 12AX7 and EL84.