Some research last night confirms what you said about the yellow half of the focus window. Looks like my camera was made between 1948 and 1950 and that was a common feature.
Originally Posted by Lamar
I've just checked and I don't see a set screw on the cocking lever. It does work but it would be nice to have it on correctly.
The focus wheel is stiff so I'll likely take the lens off to see what's causing it. I'll take your wise advise on being careful with it.
Thanks for the advice it seems prudent.