The list of 'W' refiners/mints/hallmarks:

• West Coast Refining (to do)
• Western Pacific Coin and Silver Exchange (to do)
• WGB/W. G. Buschmeyer
• Wilkinson Company
• Will & Finck
• W.S.C. (to do)
• WSR (Western States Refining)
• W&M (to do)