PART NO.  SPL.PAGE  DESCRIPTION                                                           
1A1546    15.A.3    Oil thrower -crankshaft (front) -(engine unit, 1500)
1A1546    sup.4     Thrower -oil -crankshaft -(engine unit, sup)
1A1546    16.A.4    Thrower -oil -crankshaft -(pulley, engine unit, 1600)
1A1546    TC.A.3    Oil thrower -crankshaft -(pulley, engine unit, T.C.)
1A1546    16.A.25   Thrower -oil -crankshaft front -(engine unit, 1622)
                    -changed to 12H775  -Com (e) 16GC/8263 (1622 engine)
12H775    16.A.25   Thrower -oil -crankshaft front  -Com (e) 16GC/8263 (1622 engine) 
                    -was 1A1546 Fin (e) 16GC/8262
AEH427     TC.A.7    Thrower -oil -(crankshaft, engine, Twin Cam)

1A1546 Oil thrower -crankshaft (front)
for all MGA 1500, 1600, 1600-MK-II (not Twin Cam).

-Changed to 12H775 -Com (e) 16GC/8263 (1622 engine).

More about this part at CS-201