[PeterHA (Peter)]

This is a custom made Dovetail/ Prism system including 3 prisms and one clamp.
Clamp has two screws and a brass foil so that the screws do not damage the rails.
All is black anodized aluminium, screws are stainless.
Clamp is 200mm long and clamps over a 100mm long section.
2 prism rails are 200 long and one 150mm long.
Prisms have countersunk holes for 3/8 and 1/4" screws.
Prisms are not compatible with anything I know so the clamp and the 3 prism is it.

For $ 50 I am happy to part with all or next closest offer.