6% Bond to bearer Series A of 500 Pesetas issued in Madrid in 1917.

Manufacturer of precision glass for optical devices and laboratory supplies, founded in 1911.

Superb large-format title illustrated with two allegorical figures with various scientific devices at their feet, including microscopes.

Portrait top left of the important Catalan chemist Raymond Lull (1235-1316) and right of the Spanish medical researcher Miquel Servet, burned in Switzerland in 1533 as a blasphemer.

Original signatures.