Toyo View, Omega View 4x5 Sliding Back Roll Film Adapter for graflock type roll film backs such as Mamiya RB, Graflex, Horseman and others. Accepts 6x9, 6x7, 6x6, roll film backs etc.
Well used and still works perfectly. Far from mint yet has full utility. Foam and Felt seals look OK. Slider unlatches and latches perfectly. Everything that moves, moves smoothly. Dark slide snaps into place smoothly.
$80. plus shipping.