1924 Howard Davies with E. J. Massey, decided to build his own motorcycles. Having had no success in the TT for the previous two years, he wanted to produce a reliable, quality, medium-weight racing machine, with good handling. He chose a JAP engine, Burman gearbox, Webb forks and other components from AMAC, Renold, BTH and KLG Sparking Plugs. There was a range of models, all had three speeds, a saddle tank, looked good and performed well. They were the ohv 350cc D70 and D80, 488cc D90, D70S and a 488cc sv model, with or without a sidecar.
1925 Howard Raymond Davies promoted his machine as 'Produced by a Rider' and entered the TT where he came first in the Senior and second in the Junior.
1926 The D70 was dropped and the D70s became available with a choice of 490cc or 597cc engine. There was also a new Super 90 with a two-port ohv engine.
1927 The range had several new models, including the Super 600 with a 597cc ohv engine, and other versions at the lower end of the scale.
1927 Freddie Dixon won the Junior T.T.
1928 Most of the models were still being produced, but by now the company was in financial trouble. Despite their quality, the bikes were expensive, so he tried to make lower-cost models, but he went bankrupt. Early in the year the firm was bought by Ernie Humphries of OK-Supreme who then sold it on to Philip C. Vincent, for £500, who moved production to Stevenage and produced Vincent-HRD machines.
- Note:' Enthusiasts can find further information at the Vincent-HRD owners' web site. 
Sources of Information
- The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X
-  Ian Chadwick's motorcycle web site
-  All Motorcycles Ever Made - Worldwide
-  Wolverhampton Heritage and History Society
-  Wikipedia
- Powered Vehicles made in the Black Country by Jim Boulton and Harold Parsons. Published 1990. ISBN 0 904015 30 0