Dating spode china marks
The date included is the year of introduction of the design, not the date of manufacture.In April 1988 a system of year of manufacture identification that fitted with that used by Spode was introduced and an M within a diamond was incorporated below the factory mark.The Worcester Royal Porcelain Co Ltd was formed in 1862.Over the years factory marking of pieces has evolved and although marks vary from impressed and hand written to printed emblems, the majority of bone china produced was marked in the way described below.From 1867 a letter system was also used to indicate the year of manufacture. This series of codes continued until the 1960s when the dots are arranged around the R (signifying registered) in a circle.From 1966 the date coding system was rarely used and from the mid 1960s, a different format of factory stamp was also adopted for bone china tableware.The marks almost always included a code to indicate the year of manufacture.Between 18 specific indications of the year of manufacture are rare but may sometimes be found in the form of the last two figures of the date, eg , printed below the standard mark.
The standard printed factory mark, included the number 51 in the centre that refers to the year 1751 when the Worcester Porcelain Company was founded by Dr John Wall.
The mark can appear in any colour, and on a variety of materials.