« Previous Next » Minerals Plate Block View Full Size All Images GAMM cachet for 1992 Minerals release with plate block. Cachet Gerry Adlman GAMM Cachets Format Other Tags Bullseye CropImage GammCachets Minerals Nature OfficialFirstDay PlateBlock Dates & Locations Sept. 17, 1992 Washington, DC, US Related Covers Minerals 1992 Variscite Minerals 1992 Wulfenite Minerals 1992 Strip Minerals 1992 Copper Minerals 1992 Azurite First Voyage of Columbus Italian block
