According to Andrew Sandoval's
The Monkees: The Day-by-Day Story of the 60s TV Pop Sensation, "D.W. Washburn" b/w "It's Nice to Be with You" - the Monkees' seventh single (Colgems 1023) - was released in the U.S. fifty years ago this month (June 1968). Sandoval gives a specific day (21 June) for the U.K. release (RCA 1706).