Issued by Switzerland (Helvetia) in 1988, this 50-rappen commemorative stamp marks the 100th anniversary (1888–1988) of the Swiss Metalworkers’ and Watchmakers’ Union, represented in Germany (SMUV), French (FTMH), and Italian (FLMO) abbreviations. The modern industrial design features a precision drill engraving metal — symbolizing Switzerland’s renowned engineering, machinery, and watchmaking industries. Printed by Courvoisier, the stamp reflects late-20th-century Swiss graphic minimalism combined with strong labour and industrial heritage themes. A notable topical item for collectors of labour movements, technology, and industrial history.