Found new owner
A very interesting large bowl billiard pipe from the Hardcastle's family period (before the complete acquisition by Dunhill in the 1946). However Dunhill is already invisibly present as the major shareholder (49% of stocks), but doesn't influence technical and commercial issues of the company. The pipe was made most likely before the WWII, such the shape was very popular at that time.
The pipe markings are "ROYAL CROWN \ WINDSOR \ GIANT", "MADE IN LONDON \ ENGLAND". The length is 14.5 cm (5.71"), bowl's hight is 5.1 cm (2"). External and internal diameters of the bowl are 4.1 cm (1.61") and 2.0 cm (0.79"). The depth is 4.2 cm (1.65") and this pipe weights 54 gr. Briar, vulcanite stem, aluminium stinger. The chamber has been protected with a break-in coat.