Austin 7 and 'Big 7' - Year Model Identification by Chassis Number
 
Year Month Chassis Features Introduced
1927 Oct 45 016 Speedometer drive from gearbox (BH100)
  Dec 50 901 Extensions on frame (BR 71)
1928 April 59 275 Starting handle bracket Aluminium die cast (BD17)
  July 65 442 Steering wheel with shallower dish and splined fixing (BM 126)
  Aug 67 024 Raised radiator, cowl and bonnet (BD 101)
  Sep 69 104 Coil ignition engine (BA 118)
  Dec 73 933 Wide-door metal saloon made standard
1929 June 90 030 Front spring with 8 leaves (BR 79)
  Sep 96 598 Wings with deep edge, without a mould
  Oct 99 001 Ball change speed lever (BH 113). Starter with switch (BG 124)
1930 Jan 103 458 Wings with raised moulding
  May 110 900 Dial type oil indicator (BG 138)
  July 113 000 Hand and foot controls coupled (BK43, BN 48)
1931 March 130 000 Peg type starting handle (BD 200) and nut (BB 52)
1932 Oct 159 534 Tank at rear (BE 112) 4 speed gearbox (BH 135).  Starter on off-side of engine (BG 173).  Combined induction and exhaust manifold (BE 117). Petrol gauge on instrument panel (BG 168).  Speedometer of moving figure pattern, switchbox with ignition key (BG 160).  Dashlamp embodied in instrument panel (BG 162).  Wide brake drums (BL 71, BO 144).   Spring type plated radiator cap (BD 224).  Rear axle centre case in one piece with offside tube (BO 143).
1933 June 176 687 Hardy Spicer rear universal joint (BP 126)
  Aug 179 368 3rd and 4th Speed Synchromesh gearbox (BH 224)
1934 July 198 596 Needle type prop-shaft on Saloon (BP 161).  Sloping cellulose cowl for saloon (BD 282)
  Aug 198 678 2nd, 3rd, and 4th Speed Synchromesh gearbox (BH 297).  Automatic ignition control.  Trafficator switch on steering wheel (BM 183).  Sloping cellulose cowl for tourer (BD 282).
  Nov 205 849 Ball bearing used on rear end of bevel pinion shaft replaced by roller bearing of larger diameter
1935 Jan ¹213 111 Pre-type valve spring cup fixing introduced.
  March 219 428 Radiator filler cap position changed to offside.
  April 220 395 Modified headlamps and cables in harness form, making lamps and wiring self-contained
  July 226 847 Brake shoes leverage increased
  Dec 236 210 Electrical earthing circuit, positive pole earthed
1936 Feb ¹241 541 "Nippy" Sports model fitted with faster "Speedy" engine with full pressure lubrication system
  March 241 738 1st and 2nd speed fork rod modified
  May 246 176 Cast iron drums introduced
  June 246 835 Aluminium brake shoes replaced by steel shoes
  June ¹249 001 Centre bearing for crankshaft
1937 Aug 281 472 Axle ration altered to 8/41
1938 July 290 135 Last chassis produced
       
Austin Big Seven
1938 July   First introduction
1939 Jan 20 171 Last chassis produced
       
    ¹Engine Number  

Back to top

Back to Info and Facts Page