The info I have from the museum shows that tractor was built as a 77 Standard on May 28, 1952. They built some Industrials 2 days later, so it seems odd that they would do that with a Standard. But the serial number is what it is. According to the parts book, early Standards and Industrials used the same front frame, so you won't see a difference there. I did see that the Standard ring and pinion is a little faster than the Industrial, so maybe Lull ordered them as Standards so they moved quicker. Is there a C- number on the serial tag?