Mark Eddy sends along a couple of scans of additional color variations and an error version of the Area 2-G 1971 Conclave Leather Neckerchief Slides.
It seems likely that scrap leather was used for these, so they may well exist on other colors as well.
There is also a 1791 error version.
I’ll add these images to the original post.
You can find links to other New York Area Conclave issues on this page.
“We are firmly convinced, and we act on that conviction, that with nations as with individuals our interests soundly calculated will ever be found inseparable from our moral duties, and history bears witness to the fact that a just nation is trusted on its word when recourse is had to armaments and wars to bridle others.” –Thomas Jefferson, Second Inaugural Address, 1805