This Nivada Grenchen Chronomaster Aviator Sea Diver, reference 86012M04, is offered brand new and unworn, with its original Nivada Grenchen box and papers, and is covered by the brand's manufacturer warranty from the date of purchase. Nivada Grenchen rebuilt its 1960s Chronomaster from the original drawings: a 38 mm stainless steel case with a black rotating bezel, pump pushers and a double-domed sapphire crystal. The dark blue dial carries two orange-brown counters, cream luminous hour markers and hands, an orange central chronograph hand, the tachymeter and telemeter scales of the original and the three-line "Chronomaster Aviator Sea Diver" signature. The case is water resistant to 100 meters. Inside is the Swiss Sellita SW510 M hand-wound chronograph caliber with 27 jewels, beating at 28,800 vibrations per hour with a 63-hour power reserve. The watch comes on its original stainless steel beads-of-rice bracelet, 20 mm at the lugs, closed by a hidden folding clasp. Having never been sold or worn, the watch has not required servicing. Scope of delivery: the watch, its original Nivada Grenchen presentation box and papers, a full set. Ships from Houston, Texas within 1 to 2 business days by DHL or FedEx, fully insured. We are glad to send further photographs or a live video of this Nivada Grenchen Chronomaster before purchase and usually reply within a few hours.