This switch was usually fitted in Australia on the dual stalk 1980+ moke. This was also fitted to the imported rovers where the indicators were on the right & the wipers were on the Left. The Matching indicator switch is 21A2658. 

This setup has the indicator switch on the Right hand side of the column & the wipers on the Left hand side of the column.

WARNING: DO NOT OPERATE THIS SWITCH UNTIL IT HAS BEEN BOLTED INTO THE MOUNTING PLATE ON THE INDICATOR SWITCH. THE BALL IN THE SWITCH CAN DISLODGE. THESE ARE ALL INSPECTED BEFORE DESPATCH.