Edgwick one,
Very interesting, I'm just about to get stuck into making a series of adaptors. The spindle diameter is 1 3/4" which is the smallest end of the taper, the large diameter is a little under 2", the length I haven't determined, but it is well under the 8" given for the no 15 jarno taper. I am going to imitate the taper using a dial indicator, so I'll be copying what's there!
My lathe has DL1256 stamped on the end of the carriage ways, looks like a date, I know mine is the later model with the clutch lever between the gearbox and the carriage. Unfortunately, mine doesn't have a taper attachment. Do you know how old your lathe is?
Curious to know, the potential Edgwick lathe owners club is getting bigger!
Regards, Matthew