these wheels are always very small - i would gues abt. 50/60 cms - they are actually not higher than the car is from the ground. the wheels were roughly the same radius as the modern ones, they were only made of wood and a steel rim. i will make a drawing of the handle with which it was pushed through the streets. your first image was about right.

the man who cranked the organ was mostly acco9mnpanied by his wife - when the organ had to be moved one of them pushed, the other had bands ove the shoulder and pulled - over the bridges they needed often help from street urchins.

"The light at the end of the tunnel may be an oncoming train"