Lens:

f3.5, 6 ¼" Cooke Series IIA, iris diaphragm to f32. Serial no. 210466 .

Shutter:

Compound, speeds 1 - 1/100, B, T. Serial no. 689059.

Construction:

Polished mahogany, dovetail joints.

Format:

Three, 2 ½" x 3 ½" exposures (red, green, blue) on separate plates.

Focusing:

Sliding box to 4 ½'. Scale to 6 feet.

Attributes:

Eye-level view-finder (lens/post). Coupled rangefinder using a ground glass screen.
A central mirror behind the lens directs light to the green image. An annular mirror, surrounding the fixed, directs light to the blue image situated opposite the green. Light passes between and around the two mirrors to the red image at the back of the camera. Masks in the image plane have notches to indicate, on the film, the colour of the image. The focusing knob moves all three plate chambers.

Serial Number:

H.C.I. 301/31205 .

Notes:

The lens number is also engraved on the camera body. Another, similar, Hilger camera is known having a serial no. of 1301/31202.

With:

24 single metal slides (A.P. Paris). 3 colour filters. Case.