South Africa 1932, (Jan. 26) First Flight - weather delayed  letter - The Imperial Airways liner 'City of Delhi' after leaving Salsibury on January 29th 1932 encountered a violent storm and was forced to land in a swamp and became bogged. 6 days later the mail was recovered and brought into Broken Hill. Only Registered letters have the Johannesburg and Salisbury backstamping, as seen in the back of this cover.
SOUTH WEST AFRICA - 1932 10d rate Windhoek to cover with Air 10d (SG87) tied by AIRMAIL WINDHOEK-KIMBERLEY LUGPOS cds Reg. beside; On back: Salisbury Jan. 28; Broken Hill Feb. 4 1932.