This was for timing the first development of the Autochrome plate which had to be in total darkness. Price 8/6.

This is a darkroom clock combined with a slide rule to show the development time using the Watkins Factorial method. The time taken for the image to appear is set on one of the brass dials at the end of the clock, a pointer then indicates the complete development time, the glass dial is moved so that a small hand indicates this time, the clock hand is then re-set and the clock started. The Eikronometer was shown at the 1894 RPS exhibition. There are minor variations, the example shown here is probably an early model. See Factorial Development. for details.

This is an over complicated stop clock which includes a conventional clock. A rubber bulb could be used to start and stop the mechanism. Advertisements show a different dial arrangement.

The patent is the names of Charles Welborne Piper and William Frederic Butcher.

The face of the clock shows British Patent 186132 which is in the name of C. G. Lowen and C. P. Lingwood and covers the clock mechanism.

The Landell was sold for many years by Houghtons, early modes were finished in nickel later a grey enamel finish was used.

The 1921 catalogue depicts this timer which it describes as an improved model having both second and minute hands set by turn keys. An earlier Eastman Timer (BJA 1911) had only a single hand.

Early advertisements show a cream finish.

This is placed in the electric circuit of the enlarger and switches the enlarger on for the pre-set time.

This is placed in the electric circuit of the enlarger and switches the enlarger on for the pre-set time.