[rotorwrench]

I haven't seen many case "stampings". They were mostly casting numbers whether they are inset or protruding above the surface. Ford made their own 7-tooth models well after they contracted to Gemmer to build their 2-tooth design. Ford also manufactured the 2-tooth design and most of those have very few casting markings. Ford was building a lot of cars and Henry didn't want labor strikes to slow him down. Most all of his agreements with outside contractors included rights to build the component designs in house if need be.