WSB was licensed and on the air a decade before WHEB. WSB was on 700, by 1924, then moved to 630 and then to 740. WHEB came along in late 1932, and was licensed as a daytimer, protecting WSB. In the NARBA reassignment in 1941, the 740 stations moved to 750.
But unless WHEB had been licensed 10 years earlier and had originally been on 700 and then 630, it would have had no claim to the frequencies that WSB originally occupied or the one it is still on today.
WHEB was granted a modification of its construction permit in July of 1932 and given until August 8 of that year to go on the air.