# What changed A. Lange & Söhne has released two limited-edition 1815 UP/DOWN models in a smaller 37.5 mm case. The pair use 18k pink gold (ref. 244.037) and 18k white gold (ref. 244.028) cases, each limited to 300 examples. The dials are blue solid silver (925 silver) with argenté-coloured subdials for the power-reserve and small seconds.
# Why this matters The 1815 UP/DOWN keeps the collection's pocket-watch-inspired layout but now in a more compact wrist size. The model retains the movement-integrated UP/DOWN power-reserve indicator—an element collectors associate with the reference—while upgrading the aesthetic with blue dials and matching straps.
# Key technical points
- Movement: L051.2, manually wound, 245 parts, 30.6 mm diameter, 4.6 mm thickness. It uses a three-quarter plate in untreated German silver and seven gold chatons secured by blued screws. The balance is mounted under a hand-engraved balance cock and runs at 21,600 semi-oscillations per hour. The calibre is precision-adjusted in five positions and provides up to 72 hours of autonomy.
- Case and proportions: 37.5 mm diameter, 8.7 mm height, slender stepped bezel, sapphire crystal caseback.
- Hands and dial: Argenté subdials, blued small-seconds hand, gold hour and minute hands matched to the case metal.
# How it compares to earlier 1815 UP/DOWN The UP/DOWN was introduced in 2013 with a 39 mm case and solid-silver argenté dial options. These 2026 releases keep the same movement architecture and power-reserve concept but reduce the case diameter to 37.5 mm and switch to blue 925-silver dials with contrasting subdials.
# Where and when they appeared The two new references were presented at the 2026 Concours of Elegance at Hampton Court Palace. Pricing is listed as available on request.
# Short verdict These releases compress a familiar Lange layout into a slightly smaller, dress-oriented size while preserving the movement features that define the UP/DOWN: an integrated movement display for the reserve, three-quarter-plate finishing, and classic 1815 dial details. They are limited editions with traditional Glashütte finishing and no changes to the movement's technical spec beyond the case and dial treatment.