NVT ER1 (Haynes Manual)

 NVT ER1 (Haynes Manual)
ER1 Single-speed automatic March 1976 on ; ER1SS Single-speed automatic,Jubilee model 1977 ; ER2 Two-speed automatic March 1976 on ; ER2P Two-speed automatic April 1977 on ; ER2SS Two-speed automatic,Jubilee model 1977 ; ER2L Two-speed automatic.