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* The original Inner Tube usually has the patent number stamped on the surface. | * The original Inner Tube usually has the patent number stamped on the surface. | ||
* The possessive (Dunhill's) for Shell finish was applied from 1918 up to 1934. | |||
* In 1952, the stamps changed from DUNHILL over LONDON to DUNHILL over the name of the finish, BRUYERE, ROOT BRIAR etc (see [[#Notes|notes 4]]). | * In 1952, the stamps changed from DUNHILL over LONDON to DUNHILL over the name of the finish, BRUYERE, ROOT BRIAR etc (see [[#Notes|notes 4]]). |