It's a Samson mount, if you search the iceinspace archives there have been a few mentioned there. There was a engineer in Qld (I think) that manufactured them for AOS aka astro optical supplies. There was a web page somewhere about the mount and the engineer.
http://www.turbofast.com.au/astrotel/index.html
http://www.iceinspace.com.au/forum/s...&highlight=aos