IWC Ingenieur SL ref.3505-02 "Graph Paper" cal.A/3753 / 1980s, 34mm

— An outline drawn by a master of design —

The Ingenieur SL Automatic was produced from 1983 to 1990.

This ref.3505-02 was designed by Gérald Genta.

A watch where IWC's engineering thinking and its sense of beauty are superbly fused.

— A composed size and form —

A 34mm case.

A design integrated with the case raises the level of the detail.

Compact yet substantial, it sits naturally on a modern working wrist — which is why it is called the Skinny Ingenieur.

— A distinctive graph-paper dial —

Fine graduations like graph paper — known abroad as a graph paper dial — create a sense of precision.

Original tritium is used on the hands and hour markers, keeping a vintage character.

— A calibre marking technical progress —

Built on the ETA-based Cal.375, the Cal.A/3753 carries IWC's first 21k gold rotor.

28,800 vibrations per hour, with a 42-hour power reserve.

A double construction with a soft-iron inner case keeps external magnetism out as far as possible, giving antimagnetic performance of 40,000 A/m.

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