Delma 41701.670.6.154 Shell Star Decompression Timer Automatic Watch

The Delma Shell Star Decompression Timer represents a sophisticated fusion of diving heritage and contemporary horological engineering. Drawing inspiration from DELMA's storied Shell Star collection, this automatic watch showcases distinctive design language: a spade-style seconds hand, railway-pattern hour markers, and striking orange-white contrast elements. Its defining feature-the decompression timer-stems from pioneering Swiss diving research spanning the 1950s and 1960s, delivering critical safety data through depth indicators positioned at 12 o'clock and precisely marked white ring decompression stop zones across the dial. The unidirectional rotating bezel facilitates accurate dive timing, whilst a helium escape valve and premium stainless steel case ensure 500-metre water resistance, with operational capability optimised to 700 metres above sea level. The timepiece balances professional-calibre instrumentation with refined watchmaking craftsmanship, finished with a solid steel bracelet and exhibition caseback that showcases the mechanical movement.
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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
Stainless-steel three link bracelet

Clasp
Stainless-steel deployant clasp with pushers

Water-resistance
50 ATM / 500 m / 1650 ft
Weight
150 g