Pewter Philadelphia House Bicentennial Coaster Set

Hard to find complete Set of 6 vintage 1970's Philadelphia House Co. pewter metal coasters. Bicentennial of the United States; Proclaim Liberty Throughout All the Land' Liberty Bell, Tree, Independence Hall, Eagle with shield and arrows, Eagle with 'Freedom of Religion', and Four Sheilds freedom of Assemby, Speech, the Press, and Religion. 3 ½" in diameter. Some wear and each one has a foam sticker on bottom ( see last 3 pics ).