Both technical and entertaining, the GrandCliff TNT Penta chronograph reveals a composition of five resolutely high-tech disks. The two date discs come together at 12 o'clock, while the three others, made of eloxided aluminium, indicate the 60 minutes and 12 hours of the flyback chronograph, as well as the permanent seconds. Limited edition of 201 pieces.

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Pierre DeRoche has produced the first watch movement with six retrograde seconds mechanisms. Instead of cams, all the retrograde hands are driven by gears. Thanks to a strip-spring that has replaced the classical balance-spring system, each hand returns to their initial positions after the next retrograde hand begins moving.

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