Sizes are 11/16" tall to a 1.25" wide oval. All enamel on brass except fourth item is "Sterling" on brass. All include the word "Century" or the symbol "C" and number "100" or both. Two in bottom row include "Mass. Div." and all three in bottom row include "CRC". Group begins with pin dated for "'97" Made by Marriott, Boston. Of the remaining six, four are made by Dorrety, Boston. Second pin from 1900 has bent clasp and tip of pin but still functions. Third is also 1900 and has "J.C.C.".  Fourth reads "Fall Century 1901". Some tarnish. Fifth is 1902, sixth is 1903 Fall Century, and last is Fall Century CRC 1905 with accent of red enamel leaves to symbolize fall colors in New England. All very limited and rare, All Exc. to Mint except as noted.