Found new owner
Despite the pipe was not completely marked, we hadn't difficulties with its identification (as well as with restoration). Such original finish with the panels protected from sandblasting is typical for the GBD Fantasy series. The most likely it is the 549 shape, the manufacturer has just a few models of bulldog pipes with the diamond shaped shank. The time of birth can be guessed too: similar situations with lack of marking were typical for transition periods, i.e. it is quite probably that the pipe was made around 1979-1980, just before the merge of GBD and Comoy's.
The pipe stem is marked "(GBD)". The length is 13.5 cm (5.31"), bowl's height is 3.7 cm (1.46"). External diameter of the bowl is 4.1 cm (1.61"), internal diameter is 1.7 cm (0.67"). The depth is 2.8 cm (1.1") and this pipe weights 38 gr. Briar, vulcanite stem, no filter.