These images are from a JVC VF-1900U I picked up on ebay for $17 shipped, made in 1982. There were no specs/schematics for it, but the pinouts were not that hard to figure out. The composite video input was easy to find (it was the only wire shielded) and there were markings for the 12v on the PCB. The video input was generated directly from the VGA card and converted to composite mono video via just a few resistors. See my Linux on Obsolete Display's Project Page for more info about this.
The image is inverted horizontally on the CRT, but can be corrected by reversing the horizontal deflection yoke wires. I left it alone as I will probably use the viewfinder case and builtin mirror later on.