A. Lange & Söhne 1815 Chronograph Boutique Edition Pulsometer 414.026

Lange presented it in 2015 as a non-limited model for its own boutiques, with blue on the dial, hands and strap and blued steel for the seconds, chronograph and minute-counter hands. It also brought back the pulsometer scale, graduated from 40 to 200 for reading a heart rate. Inside is the hand-wound calibre L951.5, a column-wheel flyback chronograph with a jumping minute counter that runs for 60 hours. The case is 10.8 mm thick and takes a 20 mm strap.

The other pulsometer references share the case and movement: the 414.028 in white gold with a black dial, and the pink gold 414.031 (black) and 414.032 (silver). The white gold 401.026 uses the L951.0, and the pink gold 402.032 has the L951.5, both with silver dials.