|The picture below shows a larger front and back view of this Boston Museum of Science & Hayden Planetarium Advertising Souvenir Perpetual Calendar. This metal Perpetual Calendar dial was good for the years from 1961 to 1988. It was manufactured by Anderson & Sons, Inc. of Westfield, Massachusetts. Besides the calendar, days, and years, it is marked on the two sides as follows:|
MUSEUM OF SCIENCE AND HAYDEN PLANETARIUM
1961 - 1988
PLACE YEAR UNDER MONTH
BLACK MONTHS FOR LEAP YEAR
ANDERSON & SONS, INC.
The calendar dial measures 1-11/16'' wide. It appears to be in mint condition as pictured.