Hi Deejay,
Yes the appearances are very similar indeed..... mine is exactly like your second and fourth photo! so they are pictures of scotty's... right?
as for the belt... i went to my local rover dealer and he sold me an A36 Vee Belt.... but it is a little too big... so i have ordered the A35 Vee Belt...
The spring has completely lost its tension... which i think is causing the belt to come off the pulley and become shredded.. i have searched far and wide for a new spring... but cannot seem to find any!
I love mowing lawns with this! now all i need is a bigger back lawn!!