I have this Engineer's Reference Book, Bulletin No. 137. It gives highly detailed specifications and assembly engineering data schematic diagrams offered by Spicer Manufacturing for Brown-Lipe Helical Gear Transmissions having 3, 4, 5, and 8 forward speeds, available with either Unit or Remote Control. More than 50 diagrams all together.
I would like to offer it for sale, if anyone interested in owning it or have questions about it. Just let me know.