Seth,
I, too, saw this auction (I was outbid) and was very intrigued by the two silks. This is the first time I've seen the series and I would love more information on them. Geographically, the inclusion of Guilford College makes sense, the Vassar silk, like you mentioned, throws me off a bit (nothing personal, of course, i've always had a soft spot in my heart for Vassar). A silk of Davidson College or even Duke University would make more sense.
Vassar College's inclusion opens the doors for many other schools to be in the set. I'd imagine similar schools could also, potentially, have been issued in this series (Amherst, Bowdoin, Swarthmore, Williams, etc.). Of course this is all speculation, I'd love to hear some insight from a collector with experience in the issue.
Zach
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