[Arran]

Tim;
I'm not even sure that those sockets were molded out of Bakelite, the texture makes them look like they are molded out of some other form of plastic, and the bracket makes them look sort of like a Cinch made sockets, except the Cinch ones are old bottom mount ones. The last time I bought new tube sockets I had two choices other then paying ripoff prices for so called NOS North American made ones, buy Chinese ones, or buy Soviet/Russian ones, so I bought some from a guy in Ukraine. The ones I got look like a Soviet interpretation of top mounted Amphenol octal Sockets, but I like how they reworked the terminals, they made them thicker, and made a slot instead of a pair of holes. One thing is all have the dimensions given in metric, so to make the Soviet Amphenol copies work I had to turn them down in a lathe about .020'' of an inch to fit the chassis holes.
Other then this I typically used second hand sockets salvaged from a scrap chassis, either by me or someone else. I have heard mixed opinions about the porcelain sockets (China sockets from China) not to do with lose contacts but apparently the terminals can snap off, but that may be due to rough handling, and they may vary between manufacturers.
Regards
Arran