Lt.Mike wrote:The tractor was made in Chicago. The serial number on the block will match that under the seat. The last year the A's were made in Chicago was 1947. After that the practice of matching the serial numbers seat support and block ceased.
Your tractor was made in 1946.
Here's a reference source.
http://www.tractordata.com/farm-tractor ... all-a.html
Incidentally I own 2 from the same year.