I think this must be a First Edition, 1922, as it's not dated and there's a printers code F30.322 on the back page. HB, 5.5 x 8", 312 pages, B&W illustrations.
Model Electric Locomotives & Railways by Henry Greenly, Cassell’s Model Series
MODEL ELECTRIC LOCOMOTIVES & THEIR CONSTRUCTION. Henry Greenly 1920s. Illus. HB.
Walschaerts' Valve Gear for Model Locomotives Henry Greenly p/b 63pgs ©1977
MODEL ELECTRIC LOCOMOTIVES AND RAILWAYS HENRY GREENFLY FIRST EDITION BOOK
MODEL ELECTRIC LOCOMOTIVES AND RAILWAYS HENRY GREENFLY Old Original BOOK
Model Electric Locomotives & Railways – Henry Greenly | Vintage Train Book 101
