1960sarchivalarchiveauthenticateauthenticationblack and whitecollectioncollectorseditionEstateexclusiveHoppyhoppyx.comJohn Hopkinsphotographicphotographyprintprintedstampverso Estate of John Hopkins verso stamp A rectangular printed verso stamp from the Estate of John Hopkins detailing archival edition print information: used for authenticating photographic edition prints produced by John 'Hoppy' Hopkins and the Estate Gallery: Keywords 1960sarchivalarchiveauthenticateauthenticationblack and whitecollectioncollectorseditionEstateexclusiveHoppyhoppyx.comJohn Hopkinsphotographicphotographyprintprintedstampverso
