Graham,
Funny you should ask about ordering from Deutsche Optik. My Dive Light arrived yesterday (ordered it on Sunday, shipped on Tuesday). It's pretty darn cool. There is no switch; you just unscrew the bezel, insert the batteries, and screw the bezel back on. The light goes on as soon as the threads touch. The light is pretty yellow, probably low amperage to make the batteries last on a long dive? It's a regular old threaded miniature bulb; rats, not too many xenon or halogaen screw-bases out there! The light appears brand new with no scratches or dings. The lens is the old "bullseye" type which makes it more of a flood light. At more than 3 pounds it's not a "pocket light"! It was made in Cwmbran, Wales who knows when.
Kirk