An article about the Odograph was published in the December, 1944, issue of Popular Science. At 200 pounds, the Odograph auto-created maps as soldiers navigated towards some objective. I couldn’t locate any records that indicate how many were made (anyone know), but there it appears there are nine jeeps that still have them (based on the latest info I could find). I found a few different references about it over at G503.
1. G503.com Message Forums • View topic – JEEP MOUNTED ODOGRAPH
2. G503.com Message Forums • View topic – Odograph survey
3. 1944 Willys MB Unrestored Odograph Jeep – g503 …
Here’s a photograph of a diagram from an Australia site:
http://www.aussiejeepimages.com/index.php?option=com_gallery2&Itemid=28&g2_itemId=75011
Here’s a copy of the Popular Science Magazine on eBay:
View all the information on ebay