For sale is a mattebox including railsystem (Arri standard) & camera support (as shown in the photos). This system was custom-made by Les Bosher (camera engineer from the UK) for my Russion Konvas 1M 35mm film camera and I only used it for two film project 6 years ago. As I have looked after it well and not used it very often, it is in good condition.
The system is made from High Quality Light Alloy for Superior Strength & Durability. Holder for 100 x 100mm Glass Filters with 1 off Fixed & 1off Rotating Stage. Supplied with Filter Trays.
Here is the Ebay link. Worldwide shipping