The chassis number for these model its composed of two fixed letter which are the first and third B L where L stands for long wheelbase, the second letter determines the series of the model and lastly a number that can go from 1 to 30.

Depending on the second letter of the first three letters of your chassis number you can determine what series your car is and look up any modifications done through the range.

(Left hand drive models are preceded by an L)

choose your series

Release dates Car model Chassis number Modification Modification introduced at
 Nov. 62 to May 63  S-Type 3  BAL2 to BAL30  Lengthened starter relay cable, air-conditioning unit water taps and mounting plates BAL2 
       Top and bottom hoses, stainless steel wheel discs, steering box modified to allow trapped air robe bled, windscreen wiper stops for positive parking BAL8 
       Carburettors with modified float chamber lid and needle valve, automatic gearbox torus cover BAL10 
       Hand brake cable system on right hand drive cars, heat shield fitted to right hand exhaust manifold BAL18 
       Steering hose re-routed and heat shield flitted to steering box mounting arm on left hand drive cars LBAL14 
       Improved heated rear window glass, new voltage regulator BAL16 
       Choke Introduced Into reversing light circuit BAL20 
       Increased bore of carburetter vent pipes, petrol filter repositioned BAL28 
 Jun. 64 to Jan. 65  S-Type 3  BBL2 to BBL12  Reversing and rear number plate lamp, dynamo bracket, Flywheel housing - bell housing underpan fitted (except export models to tropical or dusty countries) BBL2 
       Wider rims on rear wheels, additional cold air intake controls BBL4 
       Steering box spool valve and housing, stop/flasher relays discontinued, Link strip in place of starter solenoid cable, new speedometer and flexible drive, steering- modified power cylinder head, improved copper type battery cable BBL8 
       Steering hoses re-routed on right hand drive cars, new HT ignition cable with resistive cores, electrically operated windows stop bracket, tappet block and tappet block assemblies BBL10 
 Feb. 65 to Sep. 65  S-Type 3  BCL2 to BCL22  Ventilation holes provided to flywheel housing bell housing, camshaft BCL2 
       Interference fit cylinder liners BCL14 
       New fuel pump, SU type AUF 400 BCL18