I remember hearing stories about how the Witnesses would use phonographs in service (was this in the 1930's or 1940s?) rather than actually talking to the person, but I had never seen a picture of one until now. I didn't know the mechanics of how it worked until I read this description:
It was held vertically and when the lid was put down the needle would go down and start playing the record. The center disk screws on to hold the record tightly in place for carrying. The side drawer must be closed and once the crank is resecured as the handle everything was locked up.
Seems like a lot of trouble to go to just to avoid actually talking to the householder and this thing must have weighed a ton. By the way, if you have one now might be a good time to dust it off and put it up for auction.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=718496754