The Relay Hemmi Vintage Slide Ruler #150 is a collectible engineering tool from Japan known for its precision and durability. This slide ruler comes with a protective case, making it convenient to store and carry. Perfect for those interested in vintage engineering tools or collectors of fine craftsmanship from Japan, this Relays Hemmi slide ruler is a unique and reliable piece for any collection.

****Previous owner wrote inside cover, cover has some wear. Ruler is in very good condition.