Church Street Antiques & Interiors has dated this piece to the 1920s.
LINES ROCKING HORSES .......

In 1876 Joseph, aged 28, with outside experience in the toy trade joined his brother George who was already making wooden rocking horses. In the same year they established premises at 457 Calendonian Road (in the Steam Works Factory).

As the business continued to grow, other factories were taken over or rented and in the late nineteenth century the premises of G & J Lines were claimed to be the large toy factory in Britain.
Many of their horses carried their trademark: a thin metal disc stamped with a thistle. Their horses were sold by Harrods, Gamages, Hamleys and Selfridges.
Church Street Antiques & Interiors has dated this piece to the 1920s.
You can view the stock and full dealer information on the Church Street Antiques & Interiors Profile Page