The Titanium Field Guide

Unimatic Modello Tre U3S-T-AA (x Automobili Amos x Sease)

The Unimatic Modello Tre U3S-T-AA (x Automobili Amos x Sease) is a current-production chronograph watch with a Grade 2 titanium case, finished with sandblasted. It measures 40.0 mm across, and is water resistant to 300 m. Inside is the Sellita SW510 BH automatic chronograph movement, with 62 h power reserve. Complications: Chronograph. Brand origin: Italy.

Titanium chronograph watchesMicrobrandDisplay back
Reference–
TypeChronograph
Price– · LE 30, sold out
Case diameter40.0 mm
Thickness–
Lug-to-lug–
Water resistance300 m
Weight–
OriginItaly
MovementAutomatic chronograph
CaliberSellita SW510 BH
Power reserve62 h
ComplicationsChronograph
TitaniumGrade 2
Surface treatmentSandblasted
Nickel-freeYes
Bracelet / strapTPU strap
CrystalDomed sapphire, AR coated
Display backYes
DialTitanium gray, two subdials, tachymeter
LumeSuper-LumiNova GL
AvailabilityOffered
Statusx Automobili Amos x Sease; limited edition of 30, sold out
High confidence Verified 2026-06-22 Source: Unimatic Maker / listing ↗
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