Keywords: FMIB 38320 Belt grinder employed to remove the backs from blanks and bring them to desired thickness.jpeg check categories 26 August 2015 2 Belt grinder employed to remove the backs from blanks and bring them to desired thickness Subject Pearl button industry--Equipment and supplies Tag Shellfish 1921 Cite book Fresh-water Mussels and Mussel Industries of the United States Coker Robert E Washington DC Government Printing Office 1921 Bulletin of the United States Bureau of Fisheries vol 36 1917-1918 Plate XXXV-5 Creator Robert Ervin Coker PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 38320 Images from the Freshwater and Marine Image Bank to check Robert Ervin Coker Shell buttons |