First I would like to say, congratulations on a great find.
I actually do wish it were mine.
Second, I have to point out that it is NOT a 42, but rather a 46
The rear bumper clearly states FLUID DRIVE, a feature that first appeared on the 1946 models.
(Essentially a torque converter installed with the manual clutch.)
There are other upgraded features to the 46, such as an upgrading to the hydraulic brakes, etc.