In use the film speed is set against an index. A dial is turned to match a pointer against the meter needle. The shutter speed and aperture pairs can then be read. The meter has a baffle for bright conditions this is automatically brought into use when turning the calculator dial on the face of the meter.

In use the needle moves over a scale of shutter speeds. A dial carries film speeds and apertures. The dial is moved to line up the film speed with the needle, the shutter speed and aperture pairs can then be read. Marked 'Patent Applied For'.

The original price was £5.5.0, in the late 1940s this was reduced to £2.19.6. Versions for Leica and cine as well as the Standard model were produced. Late models may have been calibrated to f1. Also sold in a mottled brown finish. In 1955 Pullins were selling a similar meter, the Prix, on which the Chum was based.

The firm of Gosling was established in 1935, by the mid 1940s it was trading as Arthur G. Gosling with addresses in East Molesey and Ilford. In 1946 an office in Red Lion Square was opened. In 1948 the firm became I and A Gosling at the East Molesey and Red Lion address.

In use the film speed is set against an index. As the reading is taken a needle moves over a scale, a dial is moved to align the required shutter speed to the needle. The aperture is then shown against an index. Light is reflected onto the cell by a mirror. Similar in operation to the Tempiphot.

Dual range set by a switch on the front of the meter. The price was £7.19.6 in 1954.

In use the film speed is set, when the reading is taken a pointer is brought over the meter needle by moving a dial on the top of the meter, the shutter speed and aperture pairs can then be read. When used as an incident meter the film speed is set on the High-Light factor scale and the opal diffuser put in front of the cell. When not in use the diffuser is clipped to the underside of the meter.

In use the light reading is made, the value indicated by the meter needle is set on the rim of the meter against the film speed. The shutter speed and aperture pairs can then be read. Distributed by Johnsons of Hendon.