A striking ₦1 definitive from Nigeria, illustrating the country’s mid-20th-century industrial growth. The design shows a stone-quarrying operation with heavy machinery, conveyor systems, and workers engaged in material extraction. Printed by N.S.P & M. Co. Ltd., the stamp reflects Nigeria’s emphasis on infrastructure and economic development during the era. A popular issue among collectors of African industry, labor themes, and modern production processes. Crisp engraving and bold color contrasts make this a standout piece for thematic displays.