A Great Western Railway model of a valve gear, circa 1930.

A working demonstration model of a locomotive valve gear motion, axle with two spoked wheels and gear lever.

Parts of the mechanism marked:

BACK GEAR – 80 70 60 -MID GEAR – 60 70 80 – FORE GEAR

REVERSING ROD

CONNECTING ROD

10 – 100 %

EXTENSION ROD

ECCENTRIC ROD – FORE GEAR – BACK GEAR

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

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

Width: 97 cm.

Depth: 25.5 cm.

Height:37.5 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.