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bilagaana

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Sure. It's a "Piece Of Mind" meter. I think the fellow who designed (or just marketed) the device was Courtney Hafflex but it has been awhile. These were sold in the early 70's when crystal motors on cameras were new and there was some anxiety that they might not run accurately to speed. The POM meter operated from a 9-volt battery. When switched on, the LED bars (or lights - there were alternate versions) would light up in accordance with a crystal in the device. Viewed through the spinning shutter of the camera, the LED's would be stationary if the camera was tracking speed and would be seen to "walk" forward or back if the speed were faulty. By photographing the running device at the head of a roll (usually only the first roll of the day) one could provide evidence that the camera was calibrated properly. 

 

David

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4 minutes ago, Philip Perkins said:

 

That anxiety was justified, in my experience. 

 

And, at the time Hafflex introduced his meter, Arriflex was still marketing a control unit for the 16BL that used a tuning fork timer similar to the technology of Accutron watches. But I think crystal controls for the Arri were already available from others.

(Now a picture of that control unit would be a challenging item to identify.)

David

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