I recently purchased at auction a lovely 8x0 Eastman View Camera 2-D (Folmer Graflex manufacture)with a lovely Crown No. 4 tripod. The lot also included a number of film and plate holders of various sizes and types.
One interesting item was a set of several plate holders marked "8x10 BROMIDE" on the top edge and "FOLMER GRAFLEX CORP U.S.A." on the bottom edge.
The holders are single-sided, with a conventional dark slide on the live face. The back has a paneled door that opens on hinges, with two very nice slide locks - all hardware chrome plated. There is a little leather tab, held by a chrome-plated plate, to use to open the door. The holder body is an ebony back.
The plate recess is exactly 8" x 10", and each unit one includes a wood adapter to receive a 5" x 7" plate. (And there were 5x7 sheets of film held in those with masking tape!)
The holders are not the same size as a conventional Graphic-type 8x10 film holder. They are 9-5/8" high (vs. 9-5/16" for the conventional holder) and 12" long to the point from which the dark slide emerges (vs. 11-5/8" for the conventional holder). They have a locating/light seal rib rather wider than on a conventional holder and located nearer the end.
Also included was an even more curious item. This is a wood frame obviously intended to go into the camera back in place of the plate holder. It carries a glass screen, but a clear one (not ground glass). The screen is held by four clips at the edges just as we might find holding a ground glass plate into a spring back focusing plate assembly. The glass has "clipped" corners.
The clear plate has at its center an engraved "graticule" in the form of a cross 2" x 2" in overall size. On the "south and east" legs it carries marks at a spacing of 1/5", and on the "north and west" legs has major division marks at a spacing of 1/5" with minor divisions at a spacing of 1/25". (It may be that the intent is for these to be at 5 mm and 1 mm pitch; the spacing is a little irregular so I can't determine that for certain.)
This item carries no markings, but the ebony finish on the wood, the chrome plated clips, and the consistent dimensions suggests that it is a companion item.
Does any one know just what these might be and what kind of camera they were intended for use with?