One thing I have found is that 099 was code for per special bill of material. It was basically the code they used for something that wasn't in the system. You'll find it on high clearance tractors among others, as well as some early versions of a model until they decided on the codes they were going to assign them.

I'm kind of surprised that they didn't have a 'real' A code for the Heritage tractors, since they built a few of them. Too bad as well, because a person can't go through the cards and look for the right A code to find all of the Heritage tractors. The total number of that version may never be known.

The A code for that Cockshutt above is 90. At that point it time the codes were only 2 digits long. The one I have for my 1650 has 3 digits per letter code. It's A code is 089.

By the way, that build card above is for a Cockshutt 1600.