da roaringanna » 5 nov 2012, 1:24
Dear Howard,
both units in your FM WP combo are definitely from 1956, and should feature polistyrene bodies and truck side panels, stamped side lettering and early type motor (with screw-in brush caps). This because the pictures show the rear walls incorporating a small extension (just below the door) with two small slots where the metal bottom (frame) engages.
Early (1952-55) FMs used bakelite bodies, frames connected to the body by 6 screws, metal truck side panels and decals (trasfers) for lettering.
In 1957, instead, the 1956 body moulding was modified with open nose (for NMRA coupler), more detailed rear wall and door and moulded-in side grab irons - however it retained the 1956 mould number, 305. The 1956 frame was mantained, now equipped with the new motor (brushes held by hairpin springs) to be superseded sometime during the year (1957) by the plastic "tub" frame which went on to the end.
To identify any FM example you come across I suggest to refer to the table below. As you can see, the FM in 20 yrs production shared 5 body (carrozzerie) and 3 frame (telai) types only. I don't expect you'll meet too many problems with translation (numbers don't need it!) - don't esitate to ask otherwise.
Dodi
CARROZZERIE:
C-B Bakelite, 1952-55 - Per telaio T-M1
C-P1 Polistirolo, 1956 (stampo 305, muso chiuso, mancorrenti laterali riportati - Per telaio T-M2)
C-P2 Polistirolo, inizio 1957 (stampo 305, muso aperto, mancorrenti laterali incorporati, specchio di coda dettagliato - Per telaio T-M2).
C-P3a Polistirolo, fine 1957-1958 (stampo 305 - Come C-P2, lievi modifiche interne per telaio T-P. Finestrini anteriori piu' grandi per trasparenti).
C-P3b Polistirolo, 1959-71 (stampo 305 B - Identica, a parte il numero, a C-P3a. Unica differenza, plastica BIANCA anziche' NERA).
TELAI:
T-M1 Metallico, 1952-55 (avvitato, per carrozzeria C-B)
T-M2 Metallico, 1956-inizio 1957 (incastrato posteriormente, per carrozzerie C-P1 e C-P2)
T-P Plastica (vasca) fine 1957-1971. (per carrozzerie C-P3a e C-P3b)