The present 155 Revolution model is preserved in like new condition. It is no. 068 of the limited edition of 150 examples made with the specialist watch magazine Revolution, with its historically inspired design.

The ‘wristwatch with double stopwatch’ (as it was originally known by the Bundeswehr – the German armed forces – during the 1960s), which was sold in very limited quantities during the 1980s and early 1990s, is now one of manufacturer's most sought-after collector’s watches.

Back then, the company purchased phased-out watches from the inventories of the Bundeswehr (Heuer-Leonidas SA 1550 SG, shortened to Heuer 1550 SG) and sold these after reconditioning with, inter alia, added SINN lettering on the dial under the label ‘Bundeswehr Chronograph for Pilots’ as Model 155 Bw. These impressive pilot watches with flyback function were fitted with a Valjoux 230 handwound chronograph movement and a pilot’s bezel.

The design of the 155 Revolution is consistent with this historic model: the beadblasted case with a diameter of 43 mm, the convex acrylic glass, the grey pilot’s bezel manufactured from anodised aluminium, and the ivory coloured luminous gauge on the dial and hands, are distinctly reminiscent of the pilot-chronograph tradition. Even the black leather underlay strap with the stamped supply number stayed true to the original model. Moreover, the 155 Revolution is sold with a beige textile strap, which colour-blends perfectly with the ivory luminous paint.

As a symbol of the cooperation with the specialist watch-magazine Revolution, the matte black dial is adorned with a discreet, shiny-black ‘Revolution star’. In selecting the watch mechanism, Sinn chose the automatic calibre SW 510 from the Swiss manufacturer Sellita. This enables a horizontal bicompax division and central stopwatch-second display, true to the historic model, with the seconds display at 9 o’clock and the stopwatch minute display at 3 o’clock.