1959 DENTAL HEALTH #1135 Plate Block of 4 x 4 cents US Postage Stamps

1959 DENTAL HEALTH #1135 Plate Block of 4 x 4 cents US Postage Stamps - On September 14, 1959, the USPS celebrated the 100th anniversary of the American Dental Association, an organization of dentists founded in 1859 to promote oral health care and the science of dentistry. ( ADA, American Dental Association )

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