The 33 has the small air filter. The 33B has a large air filter but the carburetor behind it is just like the 33 and still no hole in the handle for winding up the starter. The 33 and 33B were all yellow.
View attachment 797840
The Super 33 has a black handle/cover and large or small air filter depending on the vintage, 33 style carburetor, normally a full wrap bar, and the hole for winding the starter.
View attachment 797841
The 35 has the large air filter and an different carburetor body where the screws that fasten the cover also hold the bottom of the carburetor to the body of the saw, still has the manual oiler button on the gearbox, and includes the hole to wind the starter.
The 35A has the large air filter and 35 style carburetor, the manual oiler button is up by the rear handle, and includes the hold to wind the starter. The 35 and 35A were all yellow.
The 39 looks like a Super 33 color scheme (black handle/cover, yellow ending & gearbox) but has the extended fuel tank, large air filter, 35 style carburetor, and the manual oiler button up by the rear handle as well as the hole to wind the starter.
There was also an add on optional remote oiler button to refit the 33 and 35 saws.
View attachment 797842
I have no idea why the stuck the bar up at an angle like that, but it is distinctive.
Mark