Two sets of Genaille's rods for multiplication with supporting board and box with thirty spare rods. Made in the Science Museum Workshops.
One of two sets of Genaille's rods for multiplication with supporting board made in the Science Museum Workshops.
One of two sets of Genaille's rods for multiplication with supporting board made in the Science Museum Workshops.
Selection of thirty rods for two sets Genaille's rods with supporting board and box made in the Science Museum Workshops.
