Cover (lid), photography accessory
Overall: 1 x 7 x 5 1/2 in. ( 2.5 x 17.8 x 14 cm )
Flat, rectangular wooden cover with curved strip of brass attached in the middle with a single screw so that it rotates freely; appears to be cover for sensitizing box slide INV.361.
Due to ongoing research, information about this object is subject to change.