My buddy bought a 52 A serval years ago from a guy that has lots of tractors and parts. When he bought it and had a fresh paint job on it. He sent the SN in to Two Cyl and the build date was November 51 and his SN falls into the 52 year. Now what has me puzzled it has the single square hole in the frame for the block nuts. Its a single stick and has square axel tubes. I know the later A models had the 2 square holes in the frame per side for the block nuts. Im wondering if its a 50 model with the earlier block on it and maybe the guy he bought it off of put a 52 model tag on it. He might of pieced a tractor together or something. The guy that he bought off of said its never been touched all original with a new paint job. Something don't add up.