The picture shows all (5) Different Old WinterCarnival Pin Back Buttons in this lot. The first one listed below is from Massachusetts and the other four are from New Hampshire. They are marked as follows:
HAVERHILL WINTERCARNIVAL JAN. 22-23-24 1930
DERRY WINTERCARNIVAL FEB. 16-18, 1940
14th ANNUAL GREATER MANCHESTER WINTERCARNIVAL 1971
To judge the sizes the largest pinback measures 1-3/4" wide. They are in excellent to mint condition.