ith his latest collection Tantum, Jean Marcel presents eight noble mechanical wristwatches in an extremely flat stainless steel case. Named after the Latin word for “only”, it features two automatic chronographs with an overall height of only 11 mm, four three-hand automatic watches with date – and an extremely slim 8 mm total height – and, as a special highlight, two hand-wound models that are only 6 mm high. Due to the minimal overall height of the watch design, the timepieces in the new Tantum collection can therefore be regarded as the flattest models in their respective market segments.

A breath on the Tantum watch glass reveals the “JM” company logo for a brief moment: this “mystery effect” by Jean Marcel, a sophisticated secret signature incorporated into the sapphire crystal’s antireflective coating, can be regarded as a unique sign of authenticity for the Swiss brand – thanks to an elaborate partial coating technology that cannot easily be imitated.

The JM H05 calibre, based on the ETA Peseux 7001, drives the hand-wound models. One of the thinnest mechanical movements of all, it is a vital part of the watch’s sensationally low total height of just 6 mm. For the first time, Jean Marcel has also incorporated the particularly slim movement JM A09, based on the ETA automatic calibre 2892A2 Élaboré, into the automatic Tantum three-hand watches with date, which again contributes significantly to the low overall height of the timepieces.

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