Seabridge Gold Customer Service Phone Numbers Customer service: 416.367.9292   Seabridge Gold Headquarters Info, Email, Phone number, Website and live chat Information Seabridge Gold is a Toronto-based North American resource exploration company. It owns Kerr Sulphurets Mitchell (KSM), a copper-gold-silver-molybdenum porphyry project in northern British Columbia. KSM’s proven-probable reserves amount to 38.2 million ounces of gold, 191 million