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> Tetra > Tetra Nachtijall Ref. 490
Brand
NOMOS
Reference Number
Tetra Nachtijall Ref. 490
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 29.5 mm by 29.5 mm; sapphire crystal glass back, height 6.3 mm; fixed with four screws.

Dial:
Lacquered

Hands:
Gold-plated

Strap:
Velour leather gray, lug width 18 mm.

Water-resistant to 3 atm.

Reference number:
490


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.