Amoco Oil and Standard Oil of Indiana padlocks. Padlocks are made by Best. 1 padlock has AMOCO engraved into it while the other 4 padlocks have Property of S.O.C. Ind. engraved into them.All the locks are keyed the same.I can only get 2 locks to open. The other ones might just need a good cleaning.All 5 locks for only $20.vintage oil and Gas Padlocks.A great price.Check out E-Bay and see how much they are selling for.