26-12-2016, 09:11 PM
In view of my previous findings and the clarity of that picture, I would say that the valve is definitely a Philips type 1927 current regulator.
I'm not sure when the side contact base (as shown on the box) came out but someone might be able to date the box - which, of course, would also date the valve inside, if it is new and unused - to within a few years.
I would still guess mid-late 30's.
The sterling pricing says it was imported for UK sale and there would't have been any more imports after May 1940 ...
I'm not sure when the side contact base (as shown on the box) came out but someone might be able to date the box - which, of course, would also date the valve inside, if it is new and unused - to within a few years.
I would still guess mid-late 30's.
The sterling pricing says it was imported for UK sale and there would't have been any more imports after May 1940 ...
