Collection USPS mini- stamp collection books

Description

This is a collection of mini booklets published by the USPS in the 1970's.  The booklets include "Canada", "Diamonds and Triangles", "European Art", "50 Stamps from 50 Countries", "Flags, Maps and Coats of Arms", "flowers", "Masterworks", and "Travel Through the Ages".  Each  booklet contains 10-30 pages with 5-20 stamps on each page.  Most of the spaces for stamps are filled in this collection but approximately 20% of the spaces are not filled.  The stamps are mixed cancelled and uncancelled.  I am selling all of this as one lot.