1950s German stereo console light bulb size question. Ich habe kein idee

Hi all, I’m trying to track down a bulb size for a the cabinet lights on an old Blaupunkt Arkansas stereo. Mine are missing so I don’t have one to compare to. I was thinking t7 15w or 15w intermediate base but both are a little big on the base. A attached a photo of someone else holding one that I found online but it’s still not clear to me. There’s also a photo of the base of that might help. I can't find a manual with that bulb size listed but 240v 15w something a little smaller than an intermediate base and I guess LED isn't a great idea with these due to the heat.

What we are working with:

Somebody allegedly holding one on internet:

Goes in here:

 

The base on these is too big and or wrong

Also the "candelabra" base is too small. 

Thanks all

I would have guessed intermediate base appliance bulb, but it looks like you have already tried that.  

Keine

The intermediate base seemed closest but a little too big. I was just hoping it's not some obsolete thing and I guess it is. Looks like possibly E14 european size in between the intermediate and cadelabra.