Nice find, sir. I always enjoy finding clay pipe bowls.
"The stamp reads 'Ben Nevis Cutty'. Ben Nevis is the highest peak in the British Isles (a fact established in 1870) and a cutty is a short-stemmed pipe.
Some Internet research has indicated that Ben Nevis was a brand of pipe made in the village of Knockcroghery, Co. Roscommon, Ireland, which was a major pipe-making centre until it was destroyed during the Irish War of Independence in June, 1921. As this coincided with the decline of pipe-smoking, due to the increasing popularity of cigarettes, the industry was never re-established..." Heritage -- Australian Antarctic Division