Robert Swinney wrote:
Chris,

Don't worry about trying to match some old socket. Go with some new sockets
and plugs as long as they have 4 prongs arnd are heavy enough to carry the
current. Better yet, hard-wire it in and get rid of cords on the floor.

Bob Swinney

Thanks for all the responses. I would buy new sockets, except for one
reason. All the parts I've collected for my phase convertor so far are
nice, old fashioned gear made from steel and cast iron. I want to
preserve this appearance for the whole machine, so I don't want to spoil
its looks by mounting a pair of el-cheapo plastic sockets on the front.
I'd like to use metal-bodied sockets if I possibly can. Any ideas?

Best wishes,

Chris