Hello,
I Thought I would resurrect this old post and add a few comments. I just purchase a N.O.S Enterprex Touch Sensor watch in perfect condition which came with the original case and instructions.
I found that when setting the watch, it is possible to choose from 4 different brightness settings which I thought was rather unique and the 24 hr setting is nice too. To your point Klippie, I have not been able to find a thinner led watch than these