I recently bought a wonderful Speed Graphic but I'm trying to determine what model and year I have. I have read that there is a date alpha / number on the camera but I have not found it. I do have the serial code if there is a way to find out from that. I figure it may be between 1947 and 1954 as the Kalart Range Finder is mounted on the side and I have both rear and front shuters. Does anyone know how to search for information on the model and age?

If there is a release lever on the lower right front of the body as you hold it in shooting position then it is a Pacemaker; in not possibally an Anniversary.
Click on the "Graflex.org" at the top of the page, click on "Cameras", then click on "Graflex Graphic Model History." There are 2 major versions of the Pacemaker so you'll have to scroll down the page to see a picture of the older one. The alpha/numeric date code applies to the newer version only.
Charles