"Large national department store"? A penney for your thoughts as to which one that might be...
A decade later, WSGN -- thinking FM was a big money-loser and would never be successful -- sold off WSGN-FM, and it became classical station WSFM. Today, of course, we know it as WDJC.
WAPI, on the other hand, seemed to be a bit more clairvoyant and held on to WAFM, which in 1958 changed calls to WAPI-FM. In the early '60s it moved to 94.5 .... and in the '90s became WYSF.