Found new owner
A very unusual pipe from the legendary Hardcastle's family times, i.e. made before acquisition by Dunhill in 1946 (and the most likely before the WWII). It's difficult to say now was the rim carved at Hardcastle's factory or was it a later improvement but the outcome looks really charmingly!
The pipe markings are "HARDCASTLE'S \ BRITISH MADE \ JACK O'LONDON", "2". The length is 14.4 cm (5.67"), bowl's height is 3.6 cm (1.42"). External diameter of the bowl is 3.6 cm (1.42"), internal diameter is 1.8 cm (0.71"). The depth is 3.0 cm (1.18") and this pipe weights 25 gr. Briar, vulcanite stem, no filter. The chamber (looks to be slightly out off center) has been protected with a break-in coat.