Some were long ago I read (HPP?) that an exact numer of blue T/A's is not known but the ratio of blue to white was 5 to 1. Or for every 1 blue T/A there were 4 white ones made. I don't remember where I read this or when, but it has stuck in the "muck" in my mind
for many years. So doing the math and knowing there were 1285 made it comes up around 320 cars. Hope this is a help, and anyone who know I am wrong please "pipe up!" Best reguards Kirk