Cunard R.M.S. Carmania And Caronia

Front:
77 燃 r .... ... CUNARD RM S CARMANIA (Turbine) and CARONIA.

Back:
CARD. CARTE POSTALE. UNIVERSAL POSTAL UNION. 4. For INLAND POSTAGE (GREAT BRITAIN IRELAND ONLY), THIS SPACE MAY BE USED FOR CORRESPONDENCE. If Posted in U.K. For Inland use, 4d. stamp. For Postal Union, 1d. stamp. If Posted in Postal Union, 1d. stamp or its equivalent.