A Great Western Railway model of a valve gear, dated 1929.

A working cutaway demonstration model of a locomotive valve gear motion, with two linked spoked wheels .

Chest cover marked:

10 – 90 %

% 10 – 100

Gear lever marked:

BACKWARD GEAR – 65 55 45 35 25 –  25 35 45 55 65 – FORWARD GEAR

Plaque engraved: Property of the Bristol G.W.R. Enginemen’s and Firemen’s mutual improvement class. JULY. 1929.

Maker’s label: TWINNING MODELS Ltd Twinning Models Ltd “Makers” Northampton

Width: 106.5 cm.

Depth: 23 cm.

Height: 31 cm.

Twining Models of Northampton, England, was founded in 1920 by Ernest W. Twining. Throughout its forty-seven-year history Twining Models established a reputation as one of the foremost British model makers. It specialised in architectural, industrial, and transport models. Before WWII they made a number of models for the Queen Mary’s Dolls House, designed by Sir Edwin Lutyens and now at Windsor Castle.