Corfield 66

Just purchased a corfield 66 camera.
does anyone have any knowledge of this camera, I'm wondering how to see the number of shots used through the little red viewer at the back ( I presume)
any help would be great as I know there can only be a handful of folk who've used this camera
thanks
Cloudroot

Here's a link to the manual on the Butkus site http://www.butkus.org/chinon/corfield/corfield_66/corfield_66.htm
if you are happy with you might consider a donation.

I used to know one of the Corfield family. This page might be interesting. http://www.corfield.org/camera/corfield.htm