Wallace has a very odd number (dash) letter date code system. The letter represents the year starting with "A" for 1931 and continues until the letter "O" for 1945. Then the letter code begins with "Z" for 1946 and reverses back in an unknown pattern until the letter "R" for 1956. This code may continue for the following two years until 1958 but that code has yet to be cracked. Then starting in 1959 the code starts with the letter "A" again for 1959 and finishes with "F" for 1964.  The number code is just as confusing, starting with 2 for January and jumping around until 14 for October. December ends with 10. The number 13 is skipped! Please see the charts below for better clarification. Usually the (dash) is used. Lastly, in the early years an unknown double letter code was used. If you have any information regarding the indecipherable double letter code, we would love to add it to our date code pages!

Year/Month

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

January

2-A

2-B

2-C

2-D

2-E

2-F

2-G

2-H

2-I

2-J

April

3-A

3-B

3-C

3-D

3-E

3-F

3-G

3-H

3-I

3-J

May

4-A

4-B

4-C

4-D

4-E

4-F

4-G

4-H

4-I

4-J

February

5-A

5-B

5-C

5-D

5-E

5-F

5-G

5-H

5-I

5-J

June

6-A

6-B

6-C

6-D

6-E

6-F

6-G

6-H

6-I

6-J

March

7-A

7-B

7-C

7-D

7-E

7-F

7-G

7-H

7-I

7-J

July

8-A

8-B

8-C

8-D

8-E

8-F

8-G

8-H

8-I

8-J

November

9-A

9-B

9-C

9-D

9-E

9-F

9-G

9-H

9-I

9-J

December

10-A

10-B

10-C

10-D

10-E

10-F

10-G

10-H

10-I

10-J

September

11-A

11-B

11-C

11-D

11-E

11-F

11-G

11-H

11-I

11-J

August

12-A

12-B

12-C

12-D

12-E

12-F

12-G

12-H

12-I

12-J

October

14-A

14-B

14-C

14-D

14-E

14-F

14-G

14-H

14-I

14-J

Year/Month

1941

1942

1943

1944

1945

1946

1947

1948

1949

1950

January

2-K

2-L

2-M

2-N

2-O

2-Z

2-Y

2-W

2-V

2-X

April

3-K

3-L

3-M

3-N

3-O

3-Z

3-Y

3-W

3-V

3-X

May

4-K

4-L

4-M

4-N

4-O

4-Z

4-Y

4-W

4-V

4-X

February

5-K

5-L

5-M

5-N

5-O

5-Z

5-Y

5-W

5-V

5-X

June

6-K

6-L

6-M

6-N

6-O

6-Z

6-Y

6-W

6-V

6-X

March

7-K

7-L

7-M

7-N

7-O

7-Z

7-Y

7-W

7-V

7-X

July

8-K

8-L

8-M

8-N

8-O

8-Z

8-Y

8-W

8-V

8-X

November

9-K

9-L

9-M

9-N

9-O

9-Z

9-Y

9-W

9-V

9-X

December

10-K

10-L

10-M

10-N

10-O

10-Z

10-Y

10-W

10-V

10-X

September

11-K

11-L

11-M

11-N

11-O

11-Z

11-Y

11-W

11-V

11-X

August

12-K

12-L

12-M

12-N

12-O

12-Z

12-Y

12-W

12-V

12-X

October

14-K

14-L

14-M

14-N

14-O

14-Z

14-Y

14-W

14-V

14-X

Year/Month

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

January

2-S

2-Q

2-P

2-U

2-T

2-R

Unknown

Unknown

A-2

B-2

April

3-S

3-Q

3-P

3-U

3-T

3-R

Unknown

Unknown

A-3

B-3

May

4-S

4-Q

4-P

4-U

4-T

4-R

Unknown

Unknown

A-4

B-4

February

5-S

5-Q

5-P

5-U

5-T

5-R

Unknown

Unknown

A-5

B-5

June

6-S

6-Q

6-P

6-U

6-T

6-R

Unknown

Unknown

A-6

B-6

March

7-S

7-Q

7-P

7-U

7-T

7-R

Unknown

Unknown

A-7

B-7

July

8-S

8-Q

8-P

8-U

8-T

8-R

Unknown

Unknown

A-8

B-8

November

9-S

9-Q

9-P

9-U

9-T

9-R

Unknown

Unknown

A-9

B-9

December

10-S

10-Q

10-P

10-U

10-T

10-R

Unknown

Unknown

A-10

B-10

September

11-S

11-Q

11-P

11-U

11-T

11-R

Unknown

Unknown

A-11

B-11

August

12-S

12-Q

12-P

12-U

12-T

12-R

Unknown

Unknown

A-12

B-12

October

14-S

14-Q

14-P

14-U

14-T

14-R

Unknown

Unknown

A-14

B-14

Year/Month

1961

1962

1963

1964

January

C-2

D-2

E-2

F-2

April

C-3

D-3

E-3

F-3

May

C-4

D-4

E-4

F-4

February

C-5

D-5

E-5

F-5

June

C-6

D-6

E-6

F-6

March

C-7

D-7

E-7

F-7

July

C-8

D-8

E-8

F-8

November

C-9

D-9

E-9

F-9

December

C-10

D-10

E-10

F-10

September

C-11

D-11

E-11

F-11

August

C-12

D-12

E-12

F-12

October

C-14

D-14

E-14

F-14