Found new owner
The "Cumberland" series is relatively young in comparison to other lines - it was introduced in 1979 and named in honor of Cumberland Street - the street where production and warehouse capacities of the company existed comfortably for many years. But such brindle ebonite stems ("cumberland" stems - also a Dunhill's invention!) make the series one of the best sellers and an objects of a highest attention of Dunhill admirers.
The pipe markings are "52264", "DUNHILL CUMBERLAND \ MADE IN ENGLAND 20". The length is 14.5 cm (5.71"), bowl's height is 5.4 cm (2.12"). External diameter of the bowl is 4.3 cm (1.69"), internal diameter is 2.0 cm (0.79"). The depth is 4.3 cm (1.69") and this pipe weights 67 gr. Briar, cumberland stem, no filter. The chamber has normal moderately smoked wear without any major issues.