Iroquois China Date Codes


The date codes consist of a letter/number code. The LETTER represents the year and the NUMBER the quarter/or month. Block letter bottom stamps were used pre-1940; and script (cursive) bottom stamps were used after 1940.

Year/Month
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
January or 1st Qtr
A-1
B-1
C-1
D-1
E-1
F-1
G-1
H-1
I-1
J-1
February or 2nd Qtr
A-2
B-2
C-2
D-2
E-2
F-2
G-2
H-2
I-2
J-2
March or 3rd Qtr
A-3
B-3
C-3
D-3
E-3
F-3
G-3
H-3
I-3
J-3
April or 4th Qtr
A-4
B-4
C-4
D-4
E-4
F-4
G-4
H-4
I-4
J-4
May
A-5
B-5
C-5
D-5
E-5
F-5
G-5
H-5
I-5
J-5
June
A-6
B-6
C-6
D-6
E-6
F-6
G-6
H-6
I-6
J-6
July
A-7
B-7
C-7
D-7
E-7
F-7
G-7
H-7
I-7
J-7
August
A-8
B-8
C-8
D-8
E-8
F-8
G-8
H-8
I-8
J-8
September
A-9
B-9
C-9
D-9
E-9
F-9
G-9
H-9
I-9
J-9
October
A-10
B-10
C-10
D-10
E-10
F-10
G-10
H-10
I-10
J-10
November
A-11
B-11
C-11
D-11
E-11
F-11
G-11
H-11
I-11
J-11
December
A-12
B-12
C-12
D-12
E-12
F-12
G-12
H-12
I-12
J-12
 
Year/Month
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
January or 1st Qtr
K-1
L-1
M-1
N-1
O-1
P-1
Q-1
R-1
S-1
T-1
February or 2nd Qtr
K-2
L-2
M-2
N-2
O-2
P-2
Q-2
R-2
S-2
T-2
March or 3rd Qtr
K-3
L-3
M-3
N-3
O-3
P-3
Q-3
R-3
S-3
T-3
April or 4th Qtr
K-4
L-4
M-4
N-4
O-4
P-4
Q-4
R-4
S-4
T-4
May
K-5
L-5
M-5
N-5
O-5
P-5
Q-5
R-5
S-5
T-5
June
K-6
L-6
M-6
N-6
O-6
P-6
Q-6
R-6
S-6
T-6
July
K-7
L-7
M-7
N-7
O-7
P-7
Q-7
R-7
S-7
T-7
August
K-8
L-8
M-8
N-8
O-8
P-8
Q-8
R-8
S-8
T-8
September
K-9
L-9
M-9
N-9
O-9
P-9
Q-9
R-9
S-9
T-9
October
K-10
L-10
M-10
N-10
O-10
P-10
Q-10
R-10
S-10
T-10
November
K-11
L-11
M-11
N-11
O-11
P-11
Q-11
R-11
S-11
T-11
December
K-12
L-12
M-12
N-12
O-12
P-12
Q-12
R-12
S-12
T-12
 
Year/Month
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
January or 1st Qtr
U-1
V-1
W-1
X-1
Y-1
Z-1
A-1
B-1
C-1
D-1
February or 2nd Qtr
U-2
V-2
W-2
X-2
Y-2
Z-2
A-2
B-2
C-2
D-2
March or 3rd Qtr
U-3
V-3
W-3
X-3
Y-3
Z-3
A-3
B-3
C-3
D-3
April or 4th Qtr
U-4
V-4
W-4
X-4
Y-4
Z-4
A-4
B-4
C-4
D-4
May
U-5
V-5
W-5
X-5
Y-5
Z-5
A-5
B-5
C-5
D-5
June
U-6
V-6
W-6
X-6
Y-6
Z-6
A-6
B-6
C-6
D-6
July
U-7
V-7
W-7
X-7
Y-7
Z-7
A-7
B-7
C-7
D-7
August
U-8
V-8
W-8
X-8
Y-8
Z-8
A-8
B-8
C-8
D-8
September
U-9
V-9
W-9
X-9
Y-9
Z-9
A-9
B-9
C-9
D-9
October
U-10
V-10
W-10
X-10
Y-10
Z-10
A-10
B-10
C-10
D-10
November
U-11
V-11
W-11
X-11
Y-11
Z-11
A-11
B-11
C-11
D-11
December
U-12
V-12
W-12
X-12
Y-12
Z-12
A-12
B-12
C-12
D-12
 
Year/Month
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
January or 1st Qtr
E-1
F-1
G-1
H-1
I-1
J-1
K-1
L-1
M-1
N-1
February or 2nd Qtr
E-2
F-2
G-2
H-2
I-2
J-2
K-2
L-2
M-2
N-2
March or 3rd Qtr
E-3
F-3
G-3
H-3
I-3
J-3
K-3
L-3
M-3
N-3
April or 4th Qtr
E-4
F-4
G-4
H-4
I-4
J-4
K-4
L-4
M-4
N-4
May
E-5
F-5
G-5
H-5
I-5
J-5
K-5
L-5
M-5
N-5
June
E-6
F-6
G-6
H-6
I-6
J-6
K-6
L-6
M-6
N-6
July
E-7
F-7
G-7
H-7
I-7
J-7
K-7
L-7
M-7
N-7
August
E-8
F-8
G-8
H-8
I-8
J-8
K-8
L-8
M-8
N-8
September
E-9
F-9
G-9
H-9
I-9
J-9
K-9
L-9
M-9
N-9
October
E-10
F-10
G-10
H-10
I-10
J-10
K-10
L-10
M-10
N-10
November
E-11
F-11
G-11
H-11
I-11
J-11
K-11
L-11
M-11
N-11
December
E-12
F-12
G-12
H-12
I-12
J-12
K-12
L-12
M-12
N-12
 
Year/Month
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
January or 1st Qtr
O-1
P-1
Q-1
R-1
S-1
T-1
U-1
V-1
W-1
X-1
February or 2nd Qtr
O-2
P-2
Q-2
R-2
S-2
T-2
U-2
V-2
W-2
X-2
March or 3rd Qtr
O-3
P-3
Q-3
R-3
S-3
T-3
U-3
V-3
W-3
X-3
April or 4th Qtr
O-4
P-4
Q-4
R-4
S-4
T-4
U-4
V-4
W-4
X-4
May
O-5
P-5
Q-5
R-5
S-5
T-5
U-5
V-5
W-5
X-5
June
O-6
P-6
Q-6
R-6
S-6
T-6
U-6
V-6
W-6
X-6
July
O-7
P-7
Q-7
R-7
S-7
T-7
U-7
V-7
W-7
X-7
August
O-8
P-8
Q-8
R-8
S-8
T-8
U-8
V-8
W-8
X-8
September
O-9
P-9
Q-9
R-9
S-9
T-9
U-9
V-9
W-9
X-9
October
O-10
P-10
Q-10
R-10
S-10
T-10
U-10
V-10
W-10
X-10
November
O-11
P-11
Q-11
R-11
S-11
T-11
U-11
V-11
W-11
X-11
December
O-12
P-12
Q-12
R-12
S-12
T-12
U-12
V-12
W-12
X-12
 
Year/Month
1965
1966
1967
1968
1969
 
January or 1st Qtr
Y-1
Z-1
Unknown
Unknown
Unknown
February or 2nd Qtr
Y-2
Z-2
Unknown
Unknown
Unknown
March or 3rd Qtr
Y-3
Z-3
Unknown
Unknown
Unknown
April or 4th Qtr
Y-4
Z-4
Unknown
Unknown
Unknown
May
Y-5
Z-5
Unknown
Unknown
Unknown
June
Y-6
Z-6
Unknown
Unknown
Unknown
July
Y-7
Z-7
Unknown
Unknown
Unknown
August
Y-8
Z-8
Unknown
Unknown
Unknown
September
Y-9
Z-9
Unknown
Unknown
Unknown
October
Y-10
Z-10
Unknown
Unknown
Unknown
November
Y-11
Z-11
Unknown
Unknown
Unknown
December
Y-12
Z-12
Unknown
Unknown
Unknown

Notes: Date code may or may not contain a (dash).


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Please note that information presented in the following pages listed by manufacturer are historical facts and are to be used only to help research and identify circa dates/users/manufactures for educational purposes. These historical facts are not copyrightable, therefore the information provided for date codes on these pages is not copyrighted. However, the format that these facts are provided in is copyrighted © RWCN The Restaurant Ware Collectors Network® and may not be reproduced for personal or commercial use elsewhere without express permission.

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