W tube fitting

Underneath the previously pictured NOS W tube was this fitting, at the time, I didn't realise it was a W tube fitting, until I dragged it out and opened it up. It revealed a second W tube, albeit gassed devastatingly. Looking closer, the lamp cap has come loose, and it looks to have taken the glass vacuum rod with it too, so I'm hopeful a repair can be made.
This is the sight that greeted me when I first opened the fitting in the shed. The gassed lamp is clearly evident here. The rubber moulded lamp holders are a very tight fit, but they are a bit too tight, as such to even remove the lamp you need a screwdriver of sorts to lever them off the pins.