In fact it's a "pre Cadogan Cadogan pipe". The brand Civic was invented by Imperial Tobacco in 1921 as an outsource producer and trader of briar pipes and fancy goods. In 1928 Civic merged with other companies, what formed Cadogan Investments - a well known and very powerful player on the modern smoking pipes market. Our todays pipe was made in 1923, i.e. "before Cadogan" - a collectable rarity!
The pipe markings are ""CIVIC" \ LONDON MADE" on the stammel, the collar is marked ""CIVIC"", "SL \ SL", and the silver hallmarks for London, 1923. The length is 12.7 cm (5"), bowl's height is 4.3 cm (1.69"). External diameter of the bowl is 3.6 cm (1.42"), internal diameter is 1.8 cm (0.71"). The depth is 3.3 cm (1.3") and this pipe weights 31 gr. Briar, vulcanite stem, no filter. It seems London jewelers were rather sparing at that times: the collar is very thin and one of its edges has got erased through over 95 years. We have stabilized it with a superglue, but unfortunatelly, it's hardly possible to do more.