How do you identify the marks on Royal Crown Derby?

ROYAL CROWN DERBY - Imari Pattern Number 2451 - Vintage bone china tea cup with fluted sides (replacement - circa 1950's) and an antique sau...

Wonderful Rare Matched Pair of Early English Regency Royal Crown Derby Porcelain Pot Pourri or Pastile Burners of traditional form. First quarter of the Nineteenth Century. Lavishly hand decorated in Imari palette with colours of Iron Red and Cobalt Blue with gilt on an off-white ground, each rim with four projecting Lion's heads ending on four paw feet on a shaped base. Condition: Superb condition for such early items, light wear to gilding at high points and some staining inside, evidence of gilt overpainting on one cover, see image. Both bases with iron red mark for circa 1815. Diameter: (entire) 5.5" (14cm). Height: 6" (15.25cm). Location: Dublin City, Ireland. Affordable Fixed Price Worldwide Store to door shipping offered by Seller. Please take time to scroll down below and click "View All From Seller" or favorite our Shop PATRICK HOWARD...

Wonderful Rare Pair of Early English Regency Royal Crown or Bloor Derby Porcelain Vases. First quarter of the Nineteenth Century. Each vase lavishly hand decorated with Summer Flow...

ROYAL CROWN DERBY - Imari Pattern Number 2451 - Antique bone china tea cup with fluted sides (circa 1912) and an antique saucer (circa 1916) - elaborat...

This large antique porcelain platter was hand-painted with traditional Imari colors at the Royal Crown Derby factory in Derbyshire, England, circa 1815. The bold pattern is distincti...

An elegant pair of 24 karat gold and white fine porcelain candlesticks by the re known English firm of Royal Crown Derby. This elaborate design of adorned birds and peacocks is appli...