Another company I know precious little about, except that it's English. According to F&S Marriot's excellent site, Pullin Optics made better-than-average photographic accessories right after the second World War, and this is what they refer to as "a neat little selenium exposure meter."

This is one several from that era that could be worn on the wrist like a watch. My Chronos is the same way, and so was a make that I don't have called a Patrol. The weight and bulk is such that it just never caught on, but it was a nice idea.