Whistle used to mark lunch time and finish of day shifts at the Glaxo Factory from the 1920's to the 1980'sThis Glaxo factory whistle played a significant role in the fabric of the populace of Port Fairy signalling lunch time and end of the working day from 1929 to 1980. Cylindrical Brass Steam Whistle with square openings in either side and thread on basecommerce, signals, glaxo, glaxo - welcome, glaxo smith kline, milk factory, glaxo wellcome, gsk, pharmaceutical