Ireland year 1981 stamps – Irish Science & Technology set MNH The Ireland 1981 “Irish Science & Technology” stamp set consists of 4 stamps that celebrate significant Irish contributions to science and technology. The stamps depict: Boyle’s air pump (12p), invented by Robert Boyle, an Irish natural philosopher born in Cork. Ferguson tractor (15p), the notable three-point linkage tractor invented by Irish engineer Harry Ferguson. Parsons turbine (16p), a reaction steam turbine designed by Irish engineer Charles Algernon Parsons. Holland submarine (20p), an early underwater vessel developed by Irish-American engineer John Philip Holland. The set was issued on March 12, 1981, printed using offset lithography with comb perforation 14 x 14½. It is popular among collectors interested in Irish history and innovation, and is often found in mint never hinged (MNH) condition. The catalogue references for these stamps include SG 474-477 and Scott 492-495.​ This 4-stamp set is a celebrated philatelic tribute to Ireland’s historical impact on science and engineering.