Rockefeller 41st Vp Inauguration Cover

Any Ideas on the cachet maker?

Although your example is not listed on this website link, the style of the cachet (particularly the ones used for the 1974 Nixon Presidential Inaugural Cover) looks to be of the same format, so I would venture to guess that the cachetmaker was A. Terins, who apparently produced cacheted covers for Presidential and Vice Presidential inaugurals in very limited editions. Although I can't speak for whether these covers are really worth the prices quoted in this link, you can evaluate that on your own:

http://www.johnterins.com/STAMP%20F...n-terins.htm

wt.

Thanks for the info.

A further note on the Terins' philatelic enterprises. In the late 1960s, John Terins published a "United Nations Specialized Catalog," which included stamps, marginal markings on the pane, sheet formats, meter mail, first flights, presentation folders, cancellations, etc., etc., in considerable detail. My "First Edition" runs through 1967, but I do not know if there were subsequent editions.

In any case, the First Editions were remaindered some years ago, for a pittance, far below the printing cost, I'm sure. It was a gallant effort, but hampered by poor-quality black and white illustrations. A tag on the inside back cover provides an email address for Terins, so the effort must have persisted well into the 1990s.

Looking at the Torins covers on the website is interesting. Terrific he made the effort to create inaugural covers with Washington postmarks. But doesn't it seem odd (even creepy?) that on the day Kennedy dies, A. Torins is busy composing cachets and getting them postmarked.
Obviously he was in New York that day, couldn't get to Dallas in time.