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> Tetra > Tetra 27 Ref. 401
Brand
NOMOS
Reference Number
Tetra 27 Ref. 401
Mechanism
Manually Wound
Collection
Tetra
Case Material
Stainless Steel
Function
Hours, Minutes, Seconds
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Case:
Stainless steel, bipartite; sapphire crystal glass; size 27.5 mm by 27.5 mm; steel back, height 6.05 mm.

Dial:
Galvanized, white and gray silver-plated.

Hands:
Steel, tempered blue.

Strap:
Horween Genuine Shell Cordovan black, lug width 18 mm.

Water-resistant to 3 atm.

Reference number:
401


Movement:
α (Alpha)—in-house built NOMOS caliber with manual winding

Diameter:
10 ½ lines (23.3 mm)

Movement height:
2.6 mm

Power reserve:
Approx. 43 hours

Characteristics:
Decentralized seconds, stop-seconds mechanism, Glashütte three-quarter plate, 17 rubies, Glashütte stopwork, Incabloc shock protection, balance spring from Nivarox 1A, adjusted in six positions, tempered blue screws, rhodium-plated movement surfaces with Glashütte ribbing and NOMOS perlage, ratchet and crown wheel with Glashütte sunburst.