The chassis number for these model its composed of two initial fixed letter which are LB where L stands for long wheelbase, followed by a third letter that determines the series of the model and lastly a number that can go from 1 to 33.

Depending on the third 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
 Jan. 6O to Dec. 60  S-Type 2  LBA1 to LBA26  Hollow camshaft replaced by solid camshaft, sealed thermal delay switch, engine vibration cushion fitted, improved throttle controls on left-hand drive cars LBA1 
       Improved type crown wheel bolts (Phase 2) LBA2 
        Introduction of seamless propeller shaft LBA4 
       Modified hydraulic tappets LBA17 
       S1 type front silencer with modified pipes and flanges, modified starter motor, new front shock damper mounting plate, brake pedal gap plate, shortened extension cone on fan mounting; extension of radiator bottom outlet pipe and new bottom water hose LBA18 
       SU carburettors, fast idle cam bracket, new radiator filler cap seal LBA19 
       Crankcase modified to raise oil level in camshaft trough, air conditioning -Tecumseh HH compressor replaced by York Shipley LBA21 
       New silencer assemblies, Additional parcel shelf speaker on non division cars, accelerator pedal stop on right hand drive cars, gearbox throttle valve control on right hand drive cars LBA25 
       New starter motor, valve rockers and shafts LBA26 
       Valves and fittings, Interior lights - changes to switching arrangements for instruments and capping rail lights and new map lamp, dynamo mounting bracket LLBA22 
       Cylinder head assembly and valves, cigar lighter with amber glow ring, ash trays in new front seat backs, spare wheel compartment cover LLBA23 
 Jan. 61 to Sep. 62  S-Type 2  LBB1 to LBB33  Heat sink introduced Into automatic choke system LBB10 
       New boot lock cam, petrol tank breather, top mounting assembly electric window lift LLBB11 
       New rear bumper support spring, sparking plug waterproof adaptor LLBB15 
       Rear window demister switch moved to instrument panel, sliding door to front door cubby box, interior mirror support stiffened, Blue floodlighting to instruments, hand brake warning light fitted, new starter ring LLBB19 
       Flasher and headlamp flick switch fitted LBB20 
       Front brakes - material of front brake clevis pins changed, modified water connections, fuel pump capacity increased LBB25 
       Improved heating system LLBB28 
       Smaller ball catches and striker plates on fall tables in rear of front seats LLBB24 
       Door seals LBB24 
       Improved valve rockers, brake pedals ball crank lever LLBB29 
       Rear lamps, lighter steering on left-hand drive cars, reversion to original starter ring, new method of lubricating cam wheel LLBB30