Here is an interesting bit of pipe history – a Dr Grabow CDL metal pipe with a briar Dublin bowl. Test marketed between 1975 and 1983, the line was never put into full production, making existing CDL pipes quite rare.
Both the rim and bottom of the bowl have been cross-hatched, obscuring the stamps. It is unclear whether this indicates a factory reject pipe or one of the test-run pipes that was sold off after the line was dropped. There are no indications of any flaws or fills in the briar, so I am leaning towards the latter explanation.
The CDL design (which stands for Cooler, Dryer, Lighter) allows air to be drawn from both the tobacco chamber and from outside the pipe via a vent on the front of the bowl. The nylon stem is removable and the flared metal shank accepts a standard Grabow filter.
Due to the nature of the nylon stem, some marks of use are visible. There is also a scorch mark on the rim of the bowl, which could be sanded out, along with the cross-hatching, if desired by the purchaser.
Pipe measures 6-1/4″ long with a 2″ tall by 1-1/4″ wide bowl. Chamber bore is 3/4″ in diameter.