very helpful. thanks for the reply. no substitute for experience.

Nice find. I just had mine overhauled. It's SN is 31021. i was unable to find out its age either. my *guess* is 1940's, though i certainly don't k...

from a different direction: being watched.....Back when i was surveying (way) more than I do now, my otherwise unoccupied, friendly, and tightwaddish...

hi charles -- that is how this one works as well. what got my attention very quickly was just how *bright and intense* the image is through this thin...

that is one thing i want to play with. Im at about 32 1/2 N Lat, so, while it could be higher, i can still get a good crick in my neck without the pr...

my feeling exactly. i started looking into one a while back (pun intended) just out of curiosity. not planning on doing any work with it or anything...

yeah, i actually did look at a lightbulb first - that's what made me wary. thanks for the reply and confirmation. im wondering what these folks used...