Mido

Origins and period

Biel/Bienne, Switzerland
Founded in 1918; active today as part of the Swatch Group

Mido in watchmaking

Mido was founded in Biel/Bienne in 1918 by Swiss watchmaker Georges Schaeren. The brand developed a reputation for dependable automatic watches, practical water-resistance systems and designs intended to remain stylistically durable. Important families include the Multifort, introduced in the 1930s; the Ocean Star diving line; and the Commander, recognized for its integrated case-and-bracelet character. Modern Mido watches combine Swiss automatic movements, long power reserves and architecture-inspired design, while the historical catalogue also includes chronographs, Powerwind automatics and unusual world-time models.

Landmark dates

1918 — Georges Schaeren establishes Mido in Biel/Bienne.

1934 — The Multifort is introduced, combining automatic winding, water resistance, antimagnetic protection and shock resistance.

Mid-1930s — Mido develops its Aquadura cork-based crown-sealing system.

1954 — The Powerwind automatic movement reduces the number of movement components and supports efficient production.

1959 — The Ocean Star line strengthens Mido’s identity in water-resistant watches.

1960s — Commander watches become closely associated with monocoque cases and integrated design.

1980s — Mido becomes part of the organization that develops into today’s Swatch Group.

Today — The brand continues producing Swiss automatic, chronometer, diving and chronograph watches.

Known for

Multifort automatic watches; Ocean Star diving watches; Commander models; Aquadura crown-sealing system; Powerwind automatic movements; monocoque case construction; chronometers; Caliber 80 movements with extended power reserve; architecture-inspired contemporary design.

Movements and innovation

Mido’s mechanical history includes bumper and rotor automatics, the efficient Powerwind family and modern ETA-based automatic calibres developed within the Swatch Group. Contemporary Caliber 80 models offer an extended power reserve of up to approximately 80 hours, with chronometer-certified versions in selected references. Older and current chronographs, day-date models and specialized displays require reference-specific calibre confirmation.

Identification checklist

Confirm the Mido signature, collection name and Swiss Made marking, then record the reference and serial numbers from the case back. Compare the dial layout, day-date language, bezel, crown, bracelet and case construction with period catalogues or official model records. Vintage Commander and Ocean Star watches may use monocoque cases requiring specialist opening methods. Front photographs alone cannot verify authenticity, originality, calibre or exact production year.

Preservation guidance

Do not force open monocoque cases; use a watchmaker familiar with front-loading construction. Keep vintage pieces dry unless professionally resealed and pressure-tested. Service automatic and chronograph movements at appropriate intervals, replace damaged crowns and gaskets sympathetically, and avoid refinishing original dials. Rinse modern dive watches after saltwater use and preserve reference numbers, bracelets, boxes and service records.