Hi all:

I snagged a Regula King KG camera today. It has a built in extinction meter.

I have two questions of anyone who knows anything about this camera:

1) There are numbers at the base of the rewind knob, some letters too. What do they mean? Is it a way of setting the ISO of the camera or some sort of reminder of a setting or some such thing?

2) How the heck do I use the extinction meter? I have worked out that I'm to read off the least dim number I can see but I don't know how to translate that to either f-stop or shutter speed.

Thanks all.