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Here is a Patent Dating Chart to help you date your items. Here is a Postcard Dating Guide
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In Mercersburg, Pa.
Dating Information for dating Dinnerware, China & Porcelain
The following information may help you identify the age and production dates of your Dinnerware or China so you will be better able to match your set with missing pieces you need. We will ad companies charts as we find them.
Homer Laughlin
| From 1900 to 1909, the first number designated the month from 1 to 12. The second single number indicated the year, and the last number 1, 2 or 3 designated the three East Liverpool, Ohio plants. |
| From 1910-1919, a letter was used to designate the month, with one or two digit numbers indicating the year and the plant was indicated the letters L or N and a plant number |
| From 1920 to 1929, a number was used to designate the month, one or two digit numbers for the year and a letter and number for the plant. From 1930 to 1960, a letter indicated the month. A two digit number indicated the year and the letter and number indicated the plant. These numbers are in addition to the name Homer Laughlin and the shape in some instances |
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ENGLISH REGISTRY MARKS
The following two diamond shaped marks were used from 1842-1883:
Mark I: Used from 1842-1867
Each letter on the diagram represents one of the tables below:
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D.-Day of the Month
E.-Bundle Number
Exceptions:
In 1857 the letter R was used during 1-19 of September, during 1860 the letter K was used for December.
To give an example using the mark above the chart, you get the following information: Material-Ceramics, Design registered-April 7, 1857.
The Bundle number is unimportant to most collectors.
Mark II: Used from 1868-1883
Each letter on the diagram represents one of the tables below:
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D.-Day of the Month
E.-Bundle Number
Exceptions:
1st-6th of March 1878, W was used for the year instead of D, and G was used for the month in place of W.
To give an example using the mark above the chart, you get the following information: Material-Ceramics, Design registered-August 9, 1870.
The Bundle number is unimportant to most collectors.
_________________________
English Registry Numbers:
After 1883 a Numerical mark was used in the following form:
Rd 742833 or Rd No. 742833
Year |
Number |
Year |
Number |
Year |
Number |
| 1884 | 1 | 1922 | 687144 | 1960 | 895000 |
| 1885 | 19754 | 1923 | 694999 | 1961 | 899914 |
| 1886 | 40480 | 1924 | 702671 | 1962 | 904638 |
| 1887 | 64520 | 1925 | 710165 | 1963 | 909364 |
| 1888 | 90483 | 1926 | 718057 | 1964 | 914536 |
| 1889 | 116648 | 1927 | 726330 | 1965 | 919607 |
| 1890 | 141273 | 1928 | 734370 | 1966 | 924510 |
| 1891 | 163767 | 1929 | 742725 | 1967 | 929335 |
| 1892 | 185713 | 1930 | 751160 | 1968 | 934515 |
| 1893 | 205240 | 1931 | 760583 | 1969 | 939875 |
| 1894 | 224720 | 1932 | 769670 | 1970 | 944932 |
| 1895 | 246975 | 1933 | 779292 | 1971 | 950046 |
| 1896 | 268392 | 1934 | 789019 | 1972 | 955342 |
| 1897 | 291241 | 1935 | 799097 | 1973 | 960708 |
| 1898 | 311658 | 1936 | 808794 | 1974 | 965185 |
| 1899 | 331707 | 1937 | 817293 | 1975 | 969249 |
| 1900 | 351202 | 1938 | 825231 | 1976 | 973838 |
| 1901 | 368154 | 1939 | 832610 | 1977 | 978426 |
| 1902 | 385180 | 1940 | 837520 | 1978 | 982815 |
| 1903 | 403200 | 1941 | 838500 | 1979 | 987910 |
| 1904 | 424400 | 1942 | 839230 | 1980 | 993012 |
| 1905 | 447800 | 1943 | 839980 | 1981 | 998302 |
| 1906 | 471860 | 1944 | 841040 | 1982 | 1004456 |
| 1907 | 493900 | 1945 | 842670 | 1983 | 1010583 |
| 1908 | 518640 | 1946 | 845550 | 1984 | 1017131 |
| 1909 | 535170 | 1947 | 849730 | 1985 | 1024174 |
| 1910 | 552000 | 1948 | 853260 | 1986 | 1031358 |
| 1911 | 574817 | 1949 | 856999 | 1987 | 1039055 |
| 1912 | 594195 | 1950 | 860854 | 1988 | 1047478 |
| 1913 | 612431 | 1951 | 863970 | 1989 | 1056076 |
| 1914 | 630190 | 1952 | 866280 | July 1989 | 1061406 (last No.) |
| 1915 | 644935 | 1953 | 869300 | Aug 1989 | 2000000 |
| 1916 | 653521 | 1954 | 872531 | 1990 | 2003720 |
| 1917 | 658988 | 1955 | 876067 | 1991 | 2012047 |
| 1918 | 662872 | 1956 | 879282 | 1992 | 2019933 |
| 1919 | 666128 | 1957 | 882949 | 1993 | 2028110 |
| 1920 | 673750 | 1958 | 887079 | 1994 | 2036116 |
| 1921 | 680147 | 1959 | 891665 | 1995 | 2044229 |
The number listed for each year in the table is the first number issued that year. . If your number is higher, but less than the number for the next year, then your item had it's design registered during that year.