Syracuse O.P.Co China Date Codes

Syracuse / O.P.Co. China Date Codes

Probably one of the mostconfusing date code systems out there because of the repetitive numbers andletters used not to mention over a century of manufacturing. Hopefully ourtable with simple explanations will help you date your pieces with ease.

A few things you will needto know to date your items. First, knowing a date range before finding yourdate code in these charts. Back stamp identification can be found in severalbooks or ebay guides. A simplified but not complete marks guide would be:O.P.Co. stands for Onondaga Pottery Company and pieces marked with theseletters dates pre 1966. Items marked with "Corp" or"Corporation" date post 1966. Pieces marked with just "O.P.Co, China" are pre 1900. Items marked with "Syracuse China" are generally post 1900 with only a few exceptions that are pretty hard tofind. Pieces marked with "Ivory", "Adobe Ware","Econo-Rim" are circa 1930 to circa 1960s.

Other things you will needto know to date your items: How the code is stamped? If it is impressed intothe ware, it is pre-1920s. If it is stamped in ink, it is generally post 1920s.Codes in circles are pre 1911 and codes in Diamonds are post 1911. Diamondcodes with numbers are repeated so knowledge of your back stamps will help(example, a piece marked with "OPCO Syracuse China", Date code 6 in adiamond would be 1919)

1895 to 1903: Date codes generally impressed into pieces. Generally within a circle.

Year/Month	1895	1896	1897	1898	1899	1900	1901	1902	1903
January		9	21	33	45	57	69	81	93
February		10	22	34	46	58	70	82	94
March		11	23	35	47	59	71	83	95
April		12	24	36	48	60	72	84	96
May	1	13	25	37	49	61	73	85	97
June	2	14	26	38	50	62	74	86	98
July	3	15	27	39	51	63	75	87	99
August	4	16	28	40	52	64	76	88	??????
September	5	17	29	41	53	65	77	89	??????
October	6	18	30	42	54	66	78	90	See next table
November	7	19	31	43	55	67	79	91	See next table
December	8	20	32	44	56	68	80	92	See next table



1903 to 1911: Date codes generally impressed into pieces, generally within a circle

Year/Month	1903	1904	1905	1906	1907	1908	1909	1910	1911
January	See prev. table	4	16	28	40	52	64	76	88
February	See prev. table	5	17	29	41	53	65	77	89
March	See prev. table	6	18	30	42	54	66	78	90
April	See prev. table	7	19	31	43	55	67	79	91
May	See prev. table	8	20	32	44	56	68	80	92
June	See prev. table	9	21	33	45	57	69	81	93
July	See prev. table	10	22	34	46	58	70	82	94
August	??????	11	23	35	47	59	71	83	95
September	??????	12	24	36	48	60	72	84	96
October	1	13	25	37	49	61	73	85	97
November	2	14	26	38	50	62	74	86	98
December	3	15	27	39	51	63	75	87	99



1912 to 1919: Date codes generally impressed into pieces, generally within a diamond

Year/Month	1912	1913	1914	1915	1916	1917	1918	1919
January	1	13	25	37	49	61	73	85
February	2	14	26	38	50	62	74	86
March	3	15