Vintage June 1956 Triumph Terrier & Tiger Cub Motorcycle Parts Catalog No.4

Vintage June 1956 Triumph Motorcycle Parts Catalog...       Cover reads, "Triumph - Replacement Parts Catalogue No. 4"...     Catalog has 59 pages of parts lists and diagrams...       Catalog is in good condition, does have some notes written on the cover in ink...       Catalog measures about  7"  x  9  1/2"...