Hi Grant, my thanks too for posting the pic...I have never laid eyes on one of these either....
It is of interest to note that this is the same engine and cowling as the Model 35 rotary; the only difference I can see is the air filter....they have even used the fuel tank strap up on the handles!
This machine is also unusual in that it was only available in 20" cutting width and first released in 1960 and as a Model 43...was the forerunner of the ubiquitous Model 45.
Interesting also to note the this very large clutch and flywheel assembly on the 43 was not employed on the 45...SB reverted to the assembly found on the Model 33 also first released in 1960.
