Slight dirt on the outside. original 1963, this is a revised 1972. This group of Walthers books on prototype lettering diagrams are all complete, in varying conditions, see below.
Lot of 4 x MODEL RAILROAD PROTOTYPE LETTERING DIAGRAMS Books. Nos. 2; 3; 4; 521
Walthers PLD 4 Prototype Lettering Diagrams, 1962~66, c/r 1972, Nice, Soft Cover
Walthers Railrod Prototype Lettering Diagrams 3 Used Between 1956 And 1962
Hornby BR Duke of Gloucester model review & prototype - Model railway article
GWR Collett 2251 model and prototype Masterclass - Model Rail magazine article
Bachmann Maunsell N 2-6-0 2mm model review & prototype - Hornby Magazine article