An old valve
 

I couldn't resist this box of valves at our local auction when I saw this amongst the mainly 50's pulls. It has A23 on the pinch which might be 1st batch of 1923. Needless to say the filament is o/c but a nice display piece. It's surprisingly heavy.

I now have 100+ more valves to store in the garage but fortunately there were only a few TV types.

Re: An old valve
 

I assume it is an Ediswan triode.

Does it have 'R' or 'AR' markings on the glass?

Re: An old valve
 

It says:

Royal
Ediswan
AR

Re: An old valve
 

I bought an o/c filament type like this once. The connections from the valve to the pins were actually soldered external joints at base of pins. I resoldered the filament connections and the valve was OK again !
Worth checking on these externally connected pins on old valves.

Re: An old valve
 

It's one of these then

http://www.r-type.org/exhib/aaj0061.htm

a nice find, even if the filament is o/c.

John