LA SPIROTECHNIQUE, années 1960
Depth gauge bracelet Z30 80 m patented by La Spirotechnique for professional divers. The brand La Spirotechnique was created in 1946 by Captain Jacques-Yves Cousteau, which later took the name of Aqua Lung, specialist in diving equipment. Round chromed metal case, black dial, painted gradation on 80m. Original rubber strap.
Diameter: 55 mm