Delma 41501.670.6.154 Shell Star Decompression Timer Automatic Watch

The DELMA Shell Star Decompression Timer represents a sophisticated fusion of vintage diving heritage and contemporary horological engineering. Rooted in Swiss decompression science from the mid-twentieth century, this automatic timepiece integrates depth monitoring and decompression stop calculations-a distinctive capability rarely found in modern watches. The unidirectional rotating bezel facilitates precise dive timing, whilst the vertical depth scale positioned at 12 o'clock provides intuitive correlation with underwater readings. Built to withstand 500 metres of water pressure with helium escape valve technology, it excels in demanding aquatic environments. Distinctive visual signatures-including the characteristic spade seconds hand, railway track hour markers, and striking orange-white contrast elements-reference DELMA's celebrated Shell Star heritage. The visible automatic movement through the exhibition caseback, combined with a durable black rubber strap, creates a purposeful instrument that seamlessly marries technical precision with enduring aesthetic refinement.
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New boxed stock with full retail boxes & paperwork


CASE DIMENSIONS
Diameter 44 mm
Height 13.8 mm
Lug width 24 mm
Lug-to-lug size 51 mm
Case Material
316L stainless steel with helium escape valve
Case Finish
Brushed and polished
Case Back
Screw-down stainless steel with 4 screws and mineral crystal
Bezel
Orange anodized aluminum, unidirectional diver bezel
Crystal
Sapphire crystal with AR coating
Crown
Stainless steel screw-down
Dial
Black dial with decompression table, applied indexes with SLN C5
Hands
Hour, minute and central seconds with SLN C5
Bracelet
Black genuine rubber strap
Clasp
Stainless-steel buckle
Water-resistance
50 ATM / 500 m / 1650 ft
Weight
150 g