Answer: burmashave

AnswerCrossword Clue
BURMASHAVEOld maker of sequential highway signs
BURMASHAVERoad-sign ad sponsor of yore
BURMASHAVESign 6
BURMASHAVESponsor of the ad
BURMASHAVEProvider of the verse
BURMASHAVEOld roadside advertiser