The book is in good overall condition. There is no date but it appears that it may be from around 1966.
The Somerset & Dorset in the Sixties Vol 4 1963-1966 (Ivo Peters, 1983)
The Somerset & Dorset Railway by D.S Barrie & C.R Clinker VERY GOOD CONDITION
The Somerset & Dorset - Then and Now
BR & ex-SR STEAM LOCOMOTIVES ON THE SOMERSET & DORSET LINE 1948-66 BOOK