Vintage La Spirotechnique Diver Wrist Depth Gage Marked US Divers buying 1966

Product Name: Vintage La Spirotechnique Diver Wrist Depth Gage Marked US Divers buying 1966
Excellent condition, minimal wear with original box and paperwork purchased by seller in 1966. The needle will never register zero (as with any precision instrument) unless at the exact temperature as when made. Exact depth is obtained by making adjustment based on water temperature. Cousteau & Gagnan used La Spirotechnique to make their equipment. Equipment in the western U.S. was handled buying by Bussoz under the name US Divers, which is marked on the face. Box does have wear (see photos) Made in France Original Owner Item #1081.