Cleveland Magazine - May 2023 by greatlakespublishing - Issuu
Newman Numismatic Portal at Washington University in St. Louis
John Harper, England 1939 - Money box - Catawiki
John Harper & Co. -mechanical piggy bank made of heavy cast iron - Catawiki
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National Bank Notes
John Harper & Co., Ltd. ca. 1950s Cast Iron Elizabeth II Coronation Throne Still Coin Penny Bank *SOLD* - - Antique Toys for Sale
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John Harper & Co. British made money boxes / money safes, circa 1900 - price guide and values
John Harper, England 1939 - Money box - Catawiki
A Guide Book of Lincoln Cents
1839 British proof set
John Harper & Co. England Jolly N.r Cast iron money box - Catawiki