Found new owner
By the way during World War II, when it was hardly possible to obtain Mediterranean briar KBB have initiated a project of growing domestic briar (mission briar or manzanita). The smoking qualities were not as good as briar but anyway this meanwhile solution was better than other replacement materials used at the same time in the UK. Of course after the end of war the project was stopped.
Our today's pipe is interesting due to two reasons: it's a graded pipe (Custom Grain followed Flame Grain in Kaywoodie's catalogues). And it's an English made pipe. Therefore the quality and smoking characteristics are English indeed!
The pipe markings are "KAYWOODIE \ Custom Grain", "LONDON ENGLAND \ 39". The length is 15.2 cm, bowl's hight is 4.9 cm. External and internal diameters of the bowl are 3.3 cm and 2.2 cm. The depth is 3.8 cm and this pipe weights 41 gr. Briar, vulcanite stem, no filter.