bkay, I had to read the serial number a couple of times. The serial number B1311936 has seven digits so would be between B-1299001 and B1319000, so 20000 model 66 machines were allocated on September 1, 1905.
It looks like Dressmaker's and 8498tx's are from the same allocation date.
Janey - Neat people never make the exciting discoveries I do.
Last edited by OurWorkbench; 08-01-2021 at 05:14 AM.