Favorite this☆ Diamond Crystal Salt Block, St. Clair, Michigan Description: View of the Diamond Crystal Salt Block factory in St. Clair, Mich., framed by a decorative border of an American flag and oak leaves. Printed on front: "Diamond Crystal Salt Block, St. Clair. Mich." Printed on back: "Michigan Calendar Co., Detroit." Details Resource ID: bh021767 Subject: Salt industry and trade--Michigan--Saint Clair Factories--Michigan--Saint Clair Postcards Publisher: Michigan Calendar Co. Date Issued: Unknown year Format: 1 postcard : col. ; 3.5 x 5.5 in Member of: Burton Historical Collection Filing Location: M/Localities-St. Clair Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.
