Dating glass backstamps
The Coalport factory was established in Shropshire by John Rose in the 1790's. became a limited liability company under its new owner Peter Bruff.The new title which was adopted included the old name.
VERY large quantities of kitchenware, serving bowls, ovenware, measuring pitchers, etc, as well as glass electrical insulators for telephone and power lines were made.
Pyrex ovenware has been a staple in American households for many decades.
Bottles and other types of heat and chemical-resistant laboratory glassware are also found with the “PYREX” name embossed on the bottom.
Beswick) Type Of Manufacture: Pottery Year Founded: 1892Founded By: James Wright Beswick and his sons John and Gilbert Founded In: Longton, Stoke-on-Trent, England, United Kingdom Year Business Sold: 1969Sold To: Doulton & Co.
During the period 1842-1883 the British Patent Office issued a diamond mark along with the registration number when a design was registered.