Little is known about the company's involvement in motorcycle production other than as detailed below:

The Encyclopaedia of the Motor Cycle – Peter Henshaw

Winco England 1920-1922

Used a 261cc (16cu in) Orbit two-stroke.

The British Motorcycle Directory – Roy Bacon and Ken Hallworth

WINCO 1920-1922

One of the many who entered the boom time of the market just after Great War, using proprietary components, no doubt assembled in a cycle shop or a back street garage. Few such firms lasted for long in these times without real capital and the boom went bust in a few years. The bright dealers had moved on early, as here.

Grace’s Guide to British Engineering (Internet) – attributes sources to two books above

Winco was a motorcycle produced from 1920 to 1922.

For a few years after the end of World War I, there was a boom in the motorcycle trade. Many firms entered the market using proprietary components, probably assembled in a cycle shop or back-street garage. The engine on this model was a 261cc Precision single.

Few such firms lasted long without sufficient capital. The clever dealers had moved on, as this one did.

Sheldon’s European Motorcycle Universe (Internet) – attributes source to Grace’s Guide

Winco was a motorcycle produced from 1920 to 1922.

For a few years after the end of World War I, there was a boom in the motorcycle trade. Many firms entered the market using proprietary components, probably assembled in a cycle shop or back street garage. The engine on this model was a 261cc Precision single.

Few such firms lasted long without sufficient capital. The clever dealers had moved on, as this one did.

Notes:

Engines used differ in the in the descriptions.

Precision – no reference of a 261cc engine has been found.