That certainly was a bargain, and a nicely executed restoration/modification as well.
Good job Bruce!
As far as the age goes it is tough, but very close to 1960.
Dating these older Wilescos ain´t very precise, as there´s missing quite a bit of solid documentation, as to when the changes was introduced exactly.
By squinting my eyes a bit, when looking at your before movie, it appears to have had the oval sticker, which as a rule of thumb would lift it to the 60´s.
But still it is old enough to have the old 1950s style connecting rod, and a 6 spoked flywheel.
At some point in the mid-60s the flywheel was changed to 5 spokes, and well before that happened, the connecting rod was changed to the flat stamped tin version.