IWC Schaffhausen Portofino Hand-Wound Monopusher (Ref. IW515103 / IW515104)

IWC presents its first-ever single push-button chronograph. With this new complication the manufacture adds a second in-house chronograph to its Portofino line. Click on “read more” to discover the timepiece …

The IWC Portofino Hand-Wound Monopusher (Ref. IW515103 / IW515104) is a single push-button stopwatch that measures time for up to 60 minutes. The chronograph push-button is integrated in the crown. Repeatedly pressing the single, multifunctional push-button starts, stops and resets the chronograph. When the button is pushed for the third time, all the chronograph displays return to zero.

The new movement in the IWC Portofino Hand-Wound Monopusher is an addition to IWC’s in-house movements and the range. The 59360 calibre is an offshoot of the 59000-movement family with the feature of a chronograph mechanism built into the movements.

One can look forward to a 192-hour movement, which, when fully wound, will run accurately for eight whole days before automatically stopping. The amount of energy remaining is displayed on the power reserve display on the dial between “8 o’clock” and “9 o’clock”. The sub-dial at “12 o’clock” displays the number of minutes recorded by the chronograph while the seconds can be read off on the central hand. Together with the small-seconds sub-dial at “6 o’clock” and the date display at “3 o’clock” it results in a well-proportioned dial design.

The sapphire-glass back exposes a movement decorated with Geneva stripes together with the chronograph mechanism.

The Portofino­Hand-Wound­Monopusher will be available either in white gold with a slate-colored dial and grey Santoni alligator leather strap as shown below or in an 18-carat red gold version with a silver-plated dial and brown Santoni alligator leather strap as shown above …

– Hand-wound

– 8-day power reserve when fully wound

– Indexless balance with 4 gold weight screws on the balance rim

– Breguet spring

– Stopwatch function with minutes and seconds

– Small hacking seconds

– Date display

– Power reserve display

Mechanical single-pusher chronograph movement … Calibre 59360 manufactured by IWC

Frequency
… 28,800 A/h (= 4 Hz)

Jewels
… 36

Power reserve … 8 days (= 192 hours)

Price … ???  (I will ad the price when I have it…)