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Chassis Number References
Listed below are modifications made to the cars and the approximate Chassis number of their introduction.
| Date | MkVI/ R-Type |
Silver Dawn | SWB Silver Wraith | LWB Silver Wraith | |
|---|---|---|---|---|---|
| November 1946 | First MkVI produced | B2AK | |||
| February 1947 | First SWB Silver Wraith produced | WTA1 | |||
| 5" dynamo | B426CF | WZB1 | |||
| April 1948 | First RR Silver Dawn produced | SBA2 | |||
| Low lift camshaft | B2DA | ||||
| Lucas windscreen wiper motor | B2DA | WDC1 | |||
| 3/8" cylinder head studs (previously 5/16") | B95DZ | WDC31 | |||
| LHF window winder | B117DZ | ||||
| Radiator heated demister | B193DZ | WFC1 | |||
| Dip and switch headlamps | B193DZ | WDC38 | |||
| Modified under-seat heater | B193DZ | WDC100 | |||
| Split skirt pistons | B2EY | WDC1 | |||
| Trico windscreen washer | B1FU | WHD1 | |||
| August 1950 | Later brake system introduced | B1GT | SCA1 | WME1 | |
| Reduced speed fan | B213GT | LSCA9 | WHD77 | ||
| Large bore carburetters (SU) | B83HP | ||||
| July 1951 | 4.5 litre engine (3 & 5/8" bore), full flow oil filter, 11" clutch | B2MD | LSFC2 | WOF1 | |
| Twin exhaust (RHD cars) | B2MD | ALW1 | |||
| January 1952 | First LWB Silver Wraith produced | ||||
| Single choke Zenith carburetter | WSG7 | ||||
| Side scuttle vents | B29MB | SDB44 | |||
| June1952 | First R Type Continental produced | BC1A | |||
| Later type headlamp | B169NY | LSHD56 | |||
| 3 position heater & demister switches | B311NY | SFC94 | WSG45 | ||
| Rear window demister | B311NY | ||||
| June 1952 | First R Type produced | B2RT | |||
| August 1952 | Last MkVI produced | B301PU | |||
| Bigger boot | B2RT | SKE2 | |||
| Two speed windscreen wiper | B2RT | WVH1 | |||
| 6.75 compression ratio head | B93TO | SMF62 | |||
| Flywheel inertia ring on cars with automatic gearbox | B236WH | CLW24 | |||
| November 1953 | Last SWB Silver Wraith produced | WVH116 | |||
| 12/41 rear axle | B1YA | SRH2 | |||
| Twin exhaust system | SRH2 | ||||
| July 1954 | 3 & 3/4 " bore engine (R Type Continental) | BC1D | |||
| October 1954 | 4" longer bonnet | BLW39 | |||
| February 1955 | Last R Type produced | B250ZY | |||
| April 1955 | Last Silver Dawn produced | SVJ133 | |||
| April 1955 | Last R Type Continental produced | BC9E | |||
| October 1955 | S Type engine used | ELW1 | |||
| December 1956 | 8:1 compression ratio engine | FLW60 | |||
| January 1958 | Last LWB Silver Wraith produced | GLW26 |