Hi Andreas
One of the main differences between the CW and the other models is the number of gears. The CW is three speed and the SW and TS have two speeds. So an easy means of identification is to look at the gear gate on top of the frame which looks to be two speed. However, the SW also has a flywheel clutch and uses a 1/2 x 3/16 chain. From the view of the flywheel which is not a flywheel clutch and the size of the chain (appears to be 5/8" x 1/4") it looks as though you have a TS frame and engine. Chris.