The roller was not on the website but a geniune good offer to make one for me from left over spare parts in their workshop. This is my collection...
This is the stationary LaSio L-30 polar planimeter set (limited range)
The wheel is smooth and slow made out of aluminium it seem. fit nicely into L-30 model planimeter.:)
This is the real picture on the sale but waiting for it to arrive might take a while :)
Everything in a box
LaSio Model L30 polar mechanical planimeter
This sketch shows a Prytz-type planimeter as built by Weston Farmer.
