The player must then go to the Milton Credit Union and open the safety deposit box. In order to open the vault, the player will need the vault code. First, go. Grey Mother's Safety Deposit Box is a Collectible item found in Episode 1 of the Wintermute story mode during the The Grey Mother mission. Hi all, I am looking for the safety deposit box for Grey Mother, and I have gone to the bank and have not found it. Thank you guys, I thought the one Grey Mother asked for was the # Glad I did not screw up! #3. <. It's about the lock box and safety deposit box keys, the quest where the grey mother wants you to retrieve something from her safety deposit. › Safe-Deposit-Boxes › k=Safe+Deposit+Boxes. SentrySafe SFWGQC Fireproof Safe and Waterproof Safe with Dial Combination Cubic Feet Gray/Black & Tray Accessory, for SFW Bank Safety Deposit Boxes - Grey (toolbox, vintage, original, metal, containers, bin, tray, organizer, bank teller, ammo box). OfTheVaultVintage. Get the best deals on Vintage Safe Deposit Box when you shop the largest VINTAGE 21 1/2" X 4 5/8" X 2 5/8" HIGH MOSLER GRAY METAL SAFE DEPOSIT BOX. Your Safe Deposit Boxes Key stock images are ready. Download all free or royalty-free Old Gray and Numbered Safety Deposit Boxes stock photography.