Vintage Sherman Sprinkler 1960's

Description

I found this at an estate sale and I've been going to them for years and this is the most unique sprinkler I've ever seen.
It has a clean out in the bottom and it adjusts from a circle coverage to a square using the knob on top.  I did NOT test that knob's functionality as when I took the video it was about 40 degrees here in the Chicago area.
It works as evidenced in the video show below, n
ot sure what the tape is doing on there and didn't want to take it off.  It's being sold as is
I have about 4 different sprinklers listed that I've acquired in the past year
sprinkler demo - YouTube
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