Gossen Bix 3 exposure meter.
The Bix 3 is an exposure meter with a match needle
system and based on a Selenium sensor. Because this meter has no
light reducing filter that can be placed in front of the sensor, the exposure meter
is made only for reflective light measurement.
It is probably one of the
first meters with the match needle system meaning the calculator disk
has to be turned until the needle with the slot is centered above
the needle of the measurement system.
The Gossen Bix 3 is sold in the USA as the Scout 3