Bonsoir à toi,
En fait ce numéro de "commission" n'a pas impacté toutes les séries. il est venu en complément du numéro de châssis. Les 2 sont utiles pour identifier l'auto.
Tu vas trouver 2 périodes de marquage un peu différentes, de 69 à 74 puis de 74 à 80.
La première séquence de chiffres donne le type de véhicule. Puis derrière le tiret tu as le numéro dans la série de construction de la bébète. La première de chaque série commence par 101.
En anglais ca dit ça :
October 1969 to 1974 “Model Year” – English Built
During the previous months leading up to the cars in this time period, a Commission Number was introduced to go along with the Chassis Number/VIN. Both are helpful in identifying a car.
The general format for the Commission Number is:
N20S-XXX
Commission Number, First Positions (“N20S” in the above example):
= Car type
20U = Pick-up
20V = Van
20W = Clubman Estate
D20S = Mini 850
N20D = Mk III Cooper S
N20S = Mini 1000
S20D = 1275GT
S20S = Clubman
Commission Number positions (“XXX” in the above example):
= Sequential number starting at 101 for each car type.
1974 “Model Year” To 1980 “Model Year” – English Built
COMMISSION NUMBER The general format for the Commission Number is:
N20S-XXX
Commission Number, First Positions (“N20S” in the above example):
= Car type
20U = Pick-up
20V = Van
20W = Clubman Estate
B20S = Mini City
D20S = Mini 850
J20S = Mini 1100 Special (UK only)
N20S = Mini 1000
S20D = 1275GT
S20S = Clubman
T20S = Mini 850 Super
Commission Number positions (“XXX” in the above example):
Starting numbers are as follows:
20U = 13205L
20V = 84679L
20W = 77031A
B20S = 101
D20S = 83622L
J20S = 101
N20S = 20531L and 230547A
S20D = 19416A
S20S = 104632A
T20S = 101
Note that there is no listed explanation for the “A” and “L” endings. If these are intended to be the same as used for VIN numbers, the “A” would be Longbridge. Literature has suggested that “L” = Morocco! This has not been confirmed from factory microfiche.
Ma source: http://www.minimania.com/article/1489/Mini_Chassis-VIN_and_Commission_Numbers__Part_I__Revised_