Produced by Rocketdyne, a division of North American Aviation, the J-2 rocket engine was the workhorse behind the S-IVB stage of the Saturn V launch vehicle in the Apollo program.
When I was a boy, I was always entranced by the intricate model of the J-2 that lay in my grandpa's study. When I was 10, he gave it to me as a birthday present, and along with it came a technical fact sheet. I've scanned this fact sheet and made it available here online.
In addition, at the request of a fan, I've taken some “orthographic” pictures.
Questions or comments? Feel free to drop me a line.