'F3' Magnas were built alongside the 'F2' two-seaters at the end of the production run in 1932. They shared the mechanical improvements of the 'F2' (e.g. the larger 12" brakes and the extra cooling pipe from the radiator) but not the two-seater body. It is possible that the 'J1' version of the Tourer body was fitted to some examples as the supply of 'D' type ones ran out, and some 'F1's were upgraded to 'F3' specification retrospectively. F1467 became an 'L' type prototype and the first production 'L' types may also have been converted 'F3's. Some survivors have been rebuilt as 'F2' replicas.
F1344	F1374	F1376	F1382	F1389	F1396
F1414	F1418	F1422	F1423	F1425	F1426
F1464	F1467/L0252	F1475	F1484	F1485	F1488	F1500
F1489	F1500	?	?	?