Thanks Grigg. The tag said Watson, Brown & Lipp, by Spicer Mfg. I don't know all the history of who made what, but after reading a few of the post here, I was surprised to see all three names on the one tag. Would you happen to know about the time periods of when these were built? I'll try taking a picture of the tag.
I'll have to do some figuring and let you know on the OD ratio.
