At 09:09 AM 7/25/2011, Mark Casey wrote: >Anyone know what year WBZ and WBZA swapped calls between Springfield and Boston? According to an online article by Doctor Auntie Donna (from the Hammond Museum of Radio site) it was in March of 1931. Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA http://plymouthcolony.net/starcityeng/index.html