One of the very first and the very collectables W.O. Larsen pipes stamped "Larsen Copenhagen". In the most sources the "Copenhagen era" isn't precisely defined but many experts call so period from the early 1960s till early 1970s. Every such Larsen pipe is usually a subject of many discussions and investigations - who actually made this pipe, there were many brilliant carvers working for W.O. Larsen. In this case we would leave the question up to your decision - in any case the pipe is a great and collectable sample from the golden era of Danish pipe making!
The pipe markings (a bit hardly visible) are "RUSTICA", "LARSEN \ COPEHAGEN \ HANDMADE \ MADE IN DENMARK". The length is 15.4 cm (6.06"), bowl's height is 6.1 cm (2.4"). External diameter of the bowl is 4.8 cm (1.89"), internal diameter is 2.6 cm (1.02"). The depth is 5.1 cm (2.01") and this pipe weights 75 gr. Briar, vulcanite stem, no filter. The chamber may look not perfectly plain but there are no critical issues definitely. The walls of the chamber may look not ideally plain but any critical issues weren't identified. There is a very small spacing (less than 0,5 mm) between the shank and stem, but the stem sits absolutely reliably.