Meter Type:

Actinometer.

Calibration:

Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Construction:

Solid silver with engine turned decoration to back. Hallmarks of Anchor, Lion, c, A.L.D 75 in back of case. Lion on ring. (Birmingham 1902).

Attributes:

The plate speed and apertures share the same scale.

Identification:

Orange cover glass.

With:

Instruction book. Speed List dated Nov. 1906. Packet of Deadmatch Paper. Advertisement sheet.

Meter Type:

Actinometer.

Calibration:

Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Construction:

Solid silver with engine turned decoration to back. Hallmarks of Anchor, Lion, a, A.W. in back of case. Lion on ring. (Birmingham 1900/01).

Attributes:

The plate speed and apertures share the same scale.

Identification:

Orange cover glass.

Meter Type:

Actinometer.

Calibration:

Plate speed: F4 - F256. Shutter speed: 1/64 - 64m. Aperture: f4 - f256.

Construction:

Solid silver with engine turned engraving to back. Hallmarks are for Chester 1903.

Attributes:

The plate speed and apertures share the same scale.

With:

Instructions. Speed List dated December 1907. Red tin case.