Majorman, if you are refering to the shape of numbers compared to the ones in you photo. The numbers stamped on the Dexta that I have brought into question, are of the same configuration. 9's are same as with 3's and 2's. Also there is no indication of renumbering it, as it is stamped on sand formed casting and no numbers stamped over another.
I will try to get a picture of serial numbers today and casting numbers.