A sliver background with a blue and red illustration of an acorn in the center, and a blue ring around it with red text.
BASTIAN BROS. CO.
This is the "Thrift Club Acorn Emblem" from Uncle Dan's Thrift Club, a club run by the Rochester Democrat and Chronicle from New York. Uncle Dan's Club Corner was the newspaper's kid's section, the section printed the kid's birthdays and taught them lessons. the Thrift Club, cited in a 1939 edition of the newspaper, rewarded children for opening a savings account by printing their birthday in the paper and giving them this button.
Club Corner (1938 January, 19). Rochester Democrat and Chronicle. p. 8.
Uncle Dan Birthday Club News (1939 January, 17). Rochester Democrat and Chronicle. p. 8.