Favorite this☆ Business card for Penobscot Safe Deposit Vaults Description: View of a business card for Penobscot Safe Deposit Vaults. Printed on front: "Penobscot Safe Deposit Vaults. Penobscot Building. Geo. W. Willard, custodian. Over. Detroit, Mich." Price list for box rental printed on back. Details Resource ID: bh015527 Subject: Safe-deposit boxes industry--Michigan--Detroit Safe-deposit companies--Michigan--Detroit Business cards Date Issued: Unknown year Format: 1 business card ; 2 x 3.5 in. Member of: Burton Historical Collection Filing Location: E&M 977.4D4 381 P Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.