Antique European double-sided wooden film and glass plate holder for large format studio, field, or travel cameras. This classic book-form double dark slide is designed for standard 18x24 cm format plates. It is a genuine vintage item from the late 19th or early 20th century, highly sought after by collectors and alternative process photographers using wet plate collodion or ambrotype techniques. The cassette features clean wooden surfaces with a numbered vintage label 1 on the side frame.

Condition
Excellent vintage and functional condition. The wood is solid, well-preserved, with no structural cracks or major warping that would affect light tightness. All moving parts, including both wooden dark slides (shutters), slide in and out smoothly as they should. The folding hinge mechanism opens and closes perfectly. Light traps appear intact, and the overall mechanical action is completely reliable for its age.

Specifications
Type: Double Plate Holder / Dark Slide
Format Size: 18x24 cm
Material: Wood, metal hinges
Capacity: Holds 2 plates (double-sided)
Country of Manufacture: European (unbranded)
Era: Circa 1890s - 1920s