From RROCA-info
Number produced: 6173
Original Specification: 6 cylinders (2 blocks of 3), side valves, 4 ½ x 4 ½ (7036 c.c.), cone clutch, 4 speeds, dual ignition with magneto and trembler coil, footbrake external contacting on propeller shaft, hand-brake internal expanding on rear drums, suspension semi-elliptic front and platform rear, wheelbase 135 ½" or 143 ½", chassis weight 2050 lbs. or 2200 lbs., tyres 875 x 105 (f) and 880 x 120 (f) and 895 x 135 (r).
| Chassis Series | Year | Comments |
| 60539-60492 | 1907 | Semi-elliptic rear suspension, 60581 |
| 60700-60799 | 1907/8 | |
| 919-1015 | 1908/9 | Friction shock absorbers |
| 1100-1199 | 1909/10 | 3 speeds, mechanical air pump, 4 ½" x 4 ¾" (7428 c.c.) |
| 1200-1299 | 1910 | |
| 1300-1399 | 1910 | |
| 1400-1499 | 1910/11 | |
| 1500-1699 | 1911 | Vibration damper |
| 1700-1799 | 1911 | Torque tube axle |
| 1800-1999 | 1912 | |
| 2000-2699 | 1912/13 | Cantilever springs from 2100 on, 4 speeds, introduced at 2400, Double rear wheel brakes, chassis tie rods |
| CA 1-20 | 1913 | |
| NA 1-58 | 1913/14 | |
| MA 1-56 | 1914 | |
| AB 1-67 | 1914 | |
| EB 1-60 | 1914 | 3 speeds discontinued, 895 x 135 tyres |
| RB 1-68 | 1914 | |
| PB 1-65 | 1914 | Large carburettor standardised, threaded union |
| YB 1-66 | 1914 | |
| LB 1-68 | 1914 | |
| GB 1-49 | 1914 | |
| TB 1-37 & 55 | 1914/15 | |
| BD 1-32 | 1915 | |
| AD 1-32 | 1915 | |
| ED 1-34 | 1915 | |
| RD 1-35 | 1915/16 | |
| CB 1-37 | 1915 | |
| PD 19-33 | 1915 | |
| AC 1-28 | 1915 | Modified chassis |
| X 1-16 | 1919/20/21 | Show models only |
| PP 1-36 | 1919 | Air pump on governor casing, 5 ½" radiator, electric starter and lighting, non-trembler coil, priming device |
| LW 1-48 | 1919 | |
| TW 1-81 | 1920 | |
| CW 1-102 | 1920 | |
| FW 1-121 | 1920 | |
| BW 1-165 | 1920 | |
| AE 1-141 | 1920 | |
| EE 1-141 | 1920 | |
| RE 1-81 | 1920 | |
| PE 1-81 | 1920 | |
| YE 1-81 | 1921 | |
| UE 1-81 | 1921 | |
| LE 1-81 | 1921 | |
| WO 1-279 | 1920/27 | Armoured car chassis |
| GE 1-81 | 1920/21 | |
| TE 1-81 | 1921 | |
| CE 1-107 | 1921 | Some numbers used by Springfield |
| NE 1-123 | 1921 | " " |
| AG 1-182 | 1921/22 | " " |
| LG 1-198 | 1921 | " " |
| UG 1-97 | 1921/22 | " " |
| SG 1-91 | 1921 | " " |
| TG 1-94 | 1922 | " " |
| KG 1-43 | 1922 | Springfield used 276KG to 400KG |
| PG 1-44 | 1922 | |
| RG 1-43 | 1922 | |
| YG 1-81 | 1922 | |
| ZG 1-81 | 1922/23 | |
| HG 1-102 | 1922/23 | |
| LK 1-100 | 1923 | 51-100 duplicated by Springfield with "S" prefix |
| NK 1-100 | 1923 | |
| PK 1-63 | 1923 | Springfield used 201PK to 300PK |
| EM 1-135 | 1924/24 | Front-wheel brakes |
| LM 1-71 | 1924 | |
| RM 1-103 | 1924 | Late cars were of 144" or 150 ½" wheel base, had 33 x 5 tyres and Autovac |
| TM 1-103 | 1924 | |
| AU 1-141 | 1924/25 | |
| EU 1-129 | 1925 |