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* "FABRICATION ANGLAISE" stamped on pipes destined for France. | * "FABRICATION ANGLAISE" stamped on pipes destined for France. | ||
* Possessive stamp: DUNHILL'S "SHELL | * Possessive stamp: DUNHILL'S "SHELL" | ||
Sometimes the patent was stamped without any date code after 1921. See if there are any additional details that can help you figure out an approximate date [[#Triggers|'''here''']]. | Sometimes the patent was stamped without any date code after 1921. See if there are any additional details that can help you figure out an approximate date [[#Triggers|'''here''']]. |