Found new owner
Everyone knows that Peterson's pipes are great smokers! And that Peterson's Shystem pipes are the greatest. You shouldn't be confused with the stamping - it's the same Peterson's system but there's nice carving instead of a metallic end cap. Very rare Peterson pipe! The series was produced in 1970-80s.
The pipe markings are "Peterson \ DUNMORE", "MADE IN THE \ REPUBLIC \ OF IRELAND", "79". The length is 15.0 cm (5.9"), bowl's hight is 5.2 cm (2.01"). External and internal diameters of the bowl are 3.3 cm (1.3") and 1.8 cm (0.7"). The depth is 3.9 cm (1.53") and this pipe weights 50 gr. Briar, vulcanite stem, no filter. The chamber has been protected with a break-in coat.