« Previous Historic Preservation Block View Full Size All Images A block of the four stamps issued in San Diego. Cachet Artcraft Format Other Tags 1970s Architecture ArtcraftCachets Block HistoricPreservation OfficialFirstDay Unaddressed Dates & Locations Oct. 29, 1971 San Diego, CA, US Related Covers Unofficial Historic Preservation San Fr… Unofficial Historic Preservation Tucson… Glass House, Modern American Architectu… Walt Disney Concert Hall, Modern Americ… Yale, Modern American Architecture Mast… Exeter Academy Library, Modern American…
