After searching and searching and searching the internet, I believe I have found the camera model used in GB1. I located it on eBay and won the auction this afternoon. Since the auction is closed, you would have to have an eBay account to view it, so I snagged the picture and put it on my personal site:
http://www.questvideoproduction.com/ima ... camera.JPG It's a Panasonic PK-750. There are some missing items from the auction, though, notably the carrying handle across the top, the windscreen for the mike, and the tape recording part (older cameras in the 80's had the two elements split up - the tape housing was connected to the camera via a video cable.) I doubt if the camera even works, but I don't care too much. It's a "prop" in my book.
Thanks to you guys' input, and thanks for steering me in the right direction K-Starr - I knew it had to be an early generation recorder like the Hitachi, so I searched for the term "vintage recorder" on Google. (At first I was going through all the Betamovie cameras one-by-one, until I switched gears to the Panasonic models.)
Thanks again,
~5B