DAVID & JOHN SHEARER, AGRICULTURAL MACHINERY MANUFACTURERS
This advertising cover has a picture of Shearer’s Patent Wrought Steel Plow & Cultivator Shares and warns: “Beware of IMITATIONS, especially UNBRANDED Shares. These shares are often imitated but never duplicated”. The pink 1d South Australia stamp is postmarked MANNUM/ 2 MA 11/ STH AUSTRALIA and it is sent to a firm of Messrs E.H. & L.O PONTT, Bakara, S.A. (Figure 1). The reverse is an advert for David Shearer &