Carrier

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Style 1:

The Date of Manufacture is in the first four digits of the serial number and represent the week and year of production:

4006A17320

40 06 A17320

40 Week

06 Year

 

Style 2:

The first four digits of the serial number represent the year and month of production:

850305091

85 03 05091

85 Year

03 Month

 

Style 3:

The first two digits of the serial number represent the month and year of manufacture:

W4D14108

W 4 D14108

W (Month) September

4 (Year) 1984

 

M January                   T    July

N February                  V   August

P March                       W   September

Q April                          X   October

R May                            Y   November   

S June                           Z   December

 

0 1980

1 1981

2 1982

3 1983

4 1984

 

Style 4:

The first two digits of the serial number represent the month and year of manufacture:

 

A167990

A 1 67990

A (Month) January

1 (Year) 1971

 

A January                   G  July

B February                 H  August

C March                       I   September

D April                         J   October

E May                           K  November

F June                          L  December

 

0 1970                 5  1975     

1 1971                   6  1976     

2 1972                  7  1977

3 1973                  8  1978     

4 1974                  9  1979