I didn't see the pic before the Craigslist ad was deleted, but the model with tank, sprung forks, and 2 speed was model # 131.80717. The solid fork single speed with tank was
#131.807161. The 10" wheeled torque converter model was a different model as well as the 6" wheeled torque converter model like mybiz posted. The model # may have changed each year also.