Once I got it home, I cleaned it up a bit. I cleaned out the battery compartment. The camera takes two PX-640a cells, which can be found online or at a battery store. I decided to not spend any money on the cells until after I could test the electronics. I haven't done that yet, as the camera works great manually. The model I have is the Lynx 5000e, which was made between 1963 and 1966. It features a 45mm f/1.8 lens -- plenty fast enough for a rangefinder camera, and a shutter speed range from B to 1/1000 sec. That's an excellent range for a leaf-shuttered camera. The Lynx 5000 takes 46mm screw-on filters, and it just so happens that I have a bunch. There is no hot-shoe, but it does have a pc flash connector on the front. In the test shots that follow, I used my intuition for the exposure, and am quite pleased with the results on Kentmere 400 film. Although not too arty, the images do show the lens is sharp and focused correctly.
I really like the size and handling of the Lynx 5000e. One nice feature is that if one sets a particular shutter speed and aperture combination for a given exposure value, the rings can rotate together to give you a series of combinations of aperture and shutter speed based on the same EV. I find that to be a very useful option, especially on a manual camera. I'll give the camera a whirl with color film soon and see how things go. I certainly recommend the Lynx 5000, and if you look around, be aware that there is a Lynx 14 -- boasting the fastest lens on a compact leaf-shutter camera -- a 45mm f/1.4 Yashinon.