I’ve seen 12,15,18,22 mm shearling options. Can anyone weigh in on what (if any) was the official thickness specs? I seem to remember Eastman saying the B6 was only spec’d in 12.
Carlos posted the three different depths I cited previously for original B-3 production. As for the B-6, it was all specified as 1/4", which is how ELC makes them and the D-1.