The Range 1907 – 1957

Apart from production during the First World War Douglas has generally been considered a minor manufacturer compared with many other well-known British manufacturers. One feature that stands out with Douglas over the years of production has been, in spite of their size, the huge number of different models they produced. Most manufacturers, even the largest, were satisfied to produce a few basic models in the popular engine sizes with only evolutionary changes from year to year. Douglas went on to manufacture as many as thirteen different models in some years ranging in size from 150cc to 750 cc with belt drive, chain drive, side valve and OHV models all in production at the same time. There is little doubt that this profligacy contributed to their frequent financial crises.

1907-1909
 2¾ HP. 340cc, SV Models A and B. in successive years
1910
2¾ HP. 340cc, SV Models C & D
1911
2¾ HP. 340cc, SV, Models D, E and Ladies Model F
1912
2¾ HP. 340cc, SV, Models G, H, J, K and Ladies Model L
1913
2¾ HP. 348cc, SV, Models N, O, P, R and Ladies Model S
1914
2¾ HP. 348cc, SV, Models T, U, V, W and Ladies model X
3½ HP, SV 496cc, Models A and  B
1915-19
2¾ HP. SV, Models U, V, W, WD and Ladies model X
4 HP. SV, 596cc, Models A, & B (Model A dropped in 1919)
1920
2¾ HP. SV, Models WD20 and WD. – 4HP. SV, 496cc, SV. Model B
1921
2¾ HP. 348cc, SV, Model WD21 and WD. – B21. 596cc, SV
2¾ HP. 348cc, OHV, Model 2¾ HP Sports
3½ HP. 496cc, OHV, Model 3½ HP Sports
1922
2¾ HP. 348cc, SV, Models V and W. – 4 HP. 596cc, SV
3½ HP. Sports. 496cc, OHV
1923
2¾ HP. SV, 348cc, Models TS, W, 3SC. – 4 HP. SV, 596cc, Models B, 4HC
3½ HP. 496cc, OHV, Model S1. – 6 HP. 733cc, OHV, Model S.2
496cc OHV, Model RA (Works only)

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1924
2¾ HP. 348cc SV. Models TS/24, SW/24, CW/24
348cc, OHV, OW/24. – 348cc, OHV, RW/24. – 496cc, OHV, Model RA/24
596cc, OHV, OB/24
1925
2¾ HP. 348cc SV. Models TS/25, CW/25. – 348cc, OHV, OW/25
496cc, OHV, Model RA/25. – 596cc, OHV, OB/25
1926
2¾ HP. 348cc SV. Models TS/26, CW/26, EW. – 596cc, OHV, OC/26
496/596cc, OHV, T.T. Replica
1927
348cc, SV, Model EW. Standard, De Luxe, Sports
596cc, SV, Model EW. Standard, Sports
596cc, OHV, Model OC. Standard, De Luxe
348, 496, 596cc, OHV, T.T. Replica
1928
348cc, SV, Models A28, B28, C28. – 348cc, OHV, Model D28
348, 496, 596cc, OHV, T.T. Replica.     596cc, OHV, Models G28, H28
496cc, OHV, Model DT5. – 596cc, OHV, Model DT6
596cc, SV, Models E28, F28
1929
348cc, SV, Models A29, B29. – 596cc, SV, Models E29, F29
596cc, OHV, Models G29, H29.- 348cc, OHV, Model D29
496cc, OHV Model DT5. – 348, 496, 596 cc. OHV, T.T Replica
1930
348cc, SV, Models L3, H3
494cc, OHV, Model DT5. – 596cc, OHV, Model DT6
494cc, OHV, Model SW5. – 596cc, OHV, Model SW6
494cc, SV, Model S5. – 596cc, SV, Models S6, T6
1931
348cc, SV, Models A31, B31. – 496cc, SV, Model C31
494cc, OHV, Model DT5. – 596cc, OHV, Model DT6
494cc, OHV, Model SW5. – 596cc, OHV, Model SW6
494cc, OHV, Model F31. – 596cc, OHV, Model G31
596cc, SV, Models D31, E31
1932
348cc, SV, A32, B32. ’Terrier’. – 496cc, SV, C32.’ Bulldog’
596cc, SV, D32. ‘Greyhound’. – 596cc,  E32. ‘Ayredale’
744cc, SV, H32. ‘Mastiff’
348cc, OHV, Model K32. – 496cc, OHV, Model M32
494cc, OHV, Model F32. – 596cc, OHV, Model G32
494cc, OHV, Model DT5. – 494cc, OHV, Model SW5
596cc, OHV, Model SW6
1933 Range uncertain:- Known machines from 1932 range
596cc, SV, Models D33, E 33 – 745cc, SV, Model H33
148cc, Two stroke ‘Bantam’. (Villiers engine)
1934
248cc, SV, Model Y. – 348cc, SV, Model Y1. – 496cc, SV, Model Y2
596cc, SV, Model Z. – 745cc, SV, Model Z1
148cc, Two stroke ‘Bantam’. Models X, X1. (Douglas Engine)
494cc, OHV, Model OW. – 596cc, OHV, Model OW1
1935
148cc, Two stroke ‘Bantam’ Models.
5X, 5X.1.- 248cc, SV, 5Y ‘Comet’.
348cc, SV, 5Y.1 ‘Cotswold’. – 494cc, SV, ‘Blue Chief’
596cc, SV, ‘Wessex’. – 745cc, SV, 5Z.1 ‘Powerflow’
496cc, 596cc, OHV, ‘Speed Specials’
496cc, SV, ‘Endeavour’ (Transverse engine and shaft drive)
1936
Aero Models all SV, in 248cc, 348cc, 496cc, 584cc
496cc, SV, ‘Endeavour’
1937
584cc, SV, Aero
1938
584cc, SV, Aero. DC/38. –  148cc Two Stroke CL/38, (Prototype only).
1939
584cc, SV, Aero DC/38

From 1914 on Douglas also produced a range of sidecars to suit most models.

During the war years 1939 to 1945 Douglas maintained production for the war effort. Included in a variety of material was a range of generator units for the British Army, Navy and Air Force. The engine unit for these was developed in 1939 as a prototype for what became the T35 post war motorcycle. All post war models from 1947 until the end of manufacture in 1957 were of nominal 350cc OHV models except for three 1948 600cc, SV. Prototypes developed for the Army that did not go into production designated DC60 and a 500cc development of 1951 of which only one prototype example survives. Also In the early 1950s Douglas manufactured a range of single cylinder stationary engines for industrial use powering water pumps, farm machinery etc.

1947 to 1949
T35 subsequently became known as Mk 1. 2,234 built.
1948 to 1949
Mk lll and Mklll Sports. 2,321 built.
1949 to 1951
Competition Model (COMP). Number built included in Mklll and Mk lV.
1949 to 1950
Mk lV  and MklV Sports. 1,842 built.
1950 to 1953
80 Plus and 90 Plus. 268 and 218  built respectively .
1949 to 1954
MkV. 3,123 built.
1954 to 1957
Dragonfly. 1,570 built.