ONSA – Original “DU – Dienshuhr Verwaltung” German WWI Service Watch

Onsa supplied “DU” marked watches are a distinct German military category. The “DU” designation signifies “Dienstuhr Verwaltung” (Administration Service Watch), issued to administrative personnel, railway workers, and non-combat Reich employees rather than front- line forces.

This differentiation from “DH” (Wehrmacht Army) and “D” (Luftwaffe) markings indicates specialized allocation. Onsa, a Swiss manufacturer, produced these timepieces from approximately 1940-1945 using standard military specifications: nickel-plated brass cases, black dials with luminous markings, and subsidiary seconds. DU watches prove considerably scarcer than DH variants due to smaller procurement quantities.

The DU category represents an often-overlooked segment of German military horology.

Case material: Chromed metal
Back Style: screw
Diameter: 34mm
Caliber: AS 1130
Rarity: * common
Condition: **** very good