After digging so hard for the one that Aris posted, I've got tons of info on Japanese bikes:
Colleda COX 1954
Engine type: 123 cc side-valve four-stroke.
Unhappy with the two-stoke engine of the time, Suzuki turned to four-strokes and side valves for 1954 with the 90cc CO and 123cc COX (picture). Both were true motorcycles having three speeds, telescopic front forks ang plunger rear suspension. The four-stroked models were replaced by 102cc Porter Free and 123cc ST during 1955 - both two-stokes.