Lange 1

Ref. 101.021

discontinuedFirst-generation Lange 1 (L901.0)DocumentedLast reviewed Not yet reviewed

Missing informationCore fields not yet documented for this reference: Water resistance

Lineage101.021191.032 →Compare with next

Authentication Notes

Dial

Medium

Outsize date (double-disc)

The patented outsize date uses a cross-and-ring double-disc mechanism; the two digits sit on one plane with no step. A single printed date wheel is incorrect.

Movement

HighHigh confidence

Hand-engraved balance cock

Every Lange balance cock is hand-engraved by a single engraver, so no two are identical. A stamped or CNC-uniform cock is a clear counterfeit indicator.

Movement

HighHigh confidence

Untreated German silver plates, gold chatons, blued screws

Lange uses untreated German-silver three-quarter plates (which tone over time), screwed gold chatons and thermally-blued screws. Rhodium-plated or chaton-free plates are wrong.

Inspection points

No inspection checklist has been published for this reference.

Browse all authentication standards →