Les, this information only partially covers your request, more information to come tonight.
No information on the motor plate, perhaps its once had a sticker on it, but I doubt it!
The lathe itself has a bit of info, listing 240v, 50hz, 3.5A and 50-2500rpm (via 2 belt ratios).
The speed controller board lists:
BC2000-TB
DC Motor Controller
Input 115/230VAC, 50/60hz, 1PH, 9A
Armature 0-90/0-180VDC, 6A
Field 100/200VDC, 1A
Best Control Inc. Made in Taiwan
The Original Diodes (still in place) read D8020L 9E5HB
The SCR's were S6025L 9A3LV, and I replaced that with an S6025L OE126 – and after reading your comments and looking into it, I believe the L equals relates to an insulated tab.
As for wiring, could I refer you to page 13 on the manual linked above, with the exception that my P1 and P3 terminals are reversed vs this image (if I am to trust the printing on the circuit board). And also my machine is configured with a single fuse in the incoming live, and another in the motor A+ side, neither of which have been problamatic so far (both F5A if I recall correctly but don't hold me to that). My 3pin wall plug had a 3A fuse which is perhaps a little low if the lathes 3.5A rating plate is to be trused but I thought it would be ok for testing without load. I did try a 5A, it blew that too.
I will recap the missing points tonight, retest the SCR's and Diodes and also retest to ensure I'm providing accurate information, because I don't understand fully what is going on it would to easy for me to get some information wrong as it's been a little while since I tested it.