Designed by: John Flanagan
Issue Dates: 1965-1998
Composition:
Pure copper core to which a copper nickel (75% copper, 25% nickel) is bonded (clad coins)
90% silver, 10% copper (silver coins)
Diameter: 24.3 mm
Weight: 5.67 grams (87.50 grains, clad coins), 6.3 grams (97.22 grains, silver coins)
Edge: Reeded
Business Strike Mintage: 35,847,439,664 (clad coins), 0 (silver coins)
Proof Mintage: 87,577,090 (clad coins), 5,939,737 (silver coins)

Following the mintage of the last silver quarter dollars for circulation in 1964, the Mint produced, beginning in 1965, the Washington design using "clad" planchets. As is the case with the dime, the planchet composition consists of a core of pure copper to which are bonded upper and lower layers of copper-nickel metal, silver in appearance, consisting of 0.75 part copper and 0.25 part nickel. This format has remained in use to the present day. Production was interrupted in 1976 by the special bicentennial motif.

Examples of the clad style are readily available in Uncirculated and Proof finishes.