Hello pipe lovers. First post here. A few years ago I came into possession of my dear uncle's modest pipe collection (about 50 pipes, all quality and pretty well cared for). Among them are several Dunhills from the 70s and 80s. One in particular has a feature that is a mystery to me. It has an indented bowl which I have never seen on any Dunhill. Pics with markings are included here. I would appreciate any insight as to the history, rarity, and (if possible and out of curiosity) worth of the pipe!