Found new owner
Despite its previous owner claimed that the pipe comes from the Pre-Patent times, we would politely disagree. The pipe is de facto a "Peterson system". The innovation of the Peterson's System pipes and the beginning of the Peterson's patent period happened almost simultaneously close to 1875. Therefore it's difficult to imagine a "pre patent Peterson's system" artifact. Nevertheless the pipe is just a bit younger, it was made between 1910 and 1915, when the Peterson patent has already expired, but the stamp "Made in Ireland" wasn't applied yet. Both the absence of the COM stamping (designation of the manufacturing country) and the button construction say this nice and very rare pipe has recently celebrated its century.
The pipe markings are "KAPP \ PETERSON'S \ MM". The length is 14.0 cm (5.51"), bowl's height is 5.3 cm (2.09"). External diameter of the bowl is 4.1 cm (1.61"); internal diameter is 2.0 cm (0.79"). The depth is 3.7 cm (1.46") and this pipe weights 68 gr. Briar, vulcanite stem (very slightly patched, you may identify the trace under a bright light), no filter. The bowl had a few surface chips which were carefully and reliably patched during the restoration. The chamber looks to be moderately smoked with just with a few scratches inside what is a miracle for the pipe of such age!