Up for 5 day  auction, US only Final sale will be shipped on Monday

Vintage 1972 MARTEK NASDS Scuba Time Calculator & attached by elastic Pencil IN THIS WELL TAKEN CARE OF CONDITION is a rare and collectible piece of scuba diving history. From nonsmoking estate

All photos are ours.

Made in the United States, this calculator wuth attached pencil set was designed for calculating scuba time and depths, making it a valuable tool for divers looking to accurately track their underwater adventures. For cleaning, it all comes apart ( see folder included)

The inclusion of folder paperwork & cleaning instructions adds to the authenticity and historical significance of this vintage piece of water sports equipment.