IA engine number odd

In spite of the '46 date code, engine number 211060 is way too high to have been built in '46. The last A serial in '46 was 182963 and engine numbers matched. Keep in mind that Louisville didn't have a foundry at that time and all the castings came in from somewhere else. Who knows what got pulled out of the Chicago warehouse and sent to Louisville. Serial number 211060 would have only been a couple months before 215866, and the engine number would have been built near the same. Since they didn't try to match serial and engine numbers, an engine unused in the factory for a couple months may not have been that unusual.

Serial number suffixes and engine number suffixes are different things. The G - High Drum Cotton Picker code is a serial number suffix. Guy Fay's book desn't have an G engine number code. My guess (just a guess) is that, the G indicates a gasoline engine. Early A production was all distilate engines with no suffix and I have never seen any other code to identify a gas engine.