Home shopping without the internet - set of 4 patterns from Mail Order House servicing or selling as several companies through local newspapers and magazines throughout the US.
Envelopes postmarked 1975.
Web info:
https://witness2fashion.wordpress.com/2014/05/09/vintage-mail-order-patterns-one-big-family/
Good vintage condition: paper yellow with age, see photos.
More vintage sewing:
https://buffalogal.ecrater.com/c/2376079/vintage-sewing?&perpage=80
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