I picked this up planning to put the head on a gem base and put an M400 on the base. I forgot that older M7s have a 20mm shaft rather than 25mm, and the M400 sold before it arrived anyway. Zooms from 6x-31x.
Anyway, this is a great classic Wild scope, their earliest zoom stereo. Like all Wild products it's well built and has great optics. When I got it the head had a prism loose but I cemented it back in position. The base is working and really nice.
Asking 500usd including US shipping, or make me an offer.