Is the A. Lange & Söhne Datograph Up/Down (Ref. 405.031) worth it?

WatchMerit currently rates the Ref. 405.031 a Buy. Legendary chrono; long-run winner.

Any offer between $129,050 and $160,950 is considered a fair price — that's a ±11% band around the median. Below that range is under-market; above it is overpriced.

Full-set examples (box, papers, unpolished) sit near the middle of that range. Watch out for missing papers or heavy polishing — expect a 5–15% discount from median in those cases. International grey-market listings can look cheaper but almost always add GST, import duty and freight once landed.

Every live listing on WatchMerit is auto-labelled Under Market, Fair Price or Overpriced against this band, so you never have to guess.

Legendary chrono; long-run winner. Collector demand is currently High — Widely called finest chrono ever.

Buying new from an authorised dealer typically involves a wait of about 3 years (Datograph Up/Down multi-year boutique list). For most buyers, the secondary market is the realistic route.

Historical secondary-market prices for the Ref. 405.031 have appreciated approximately 61.1% from the earliest tracked year to today, indexed from public market data, auction results and Australian dealer trade sheets.

Indicative only. Not financial advice. Past performance does not guarantee future returns.

A benchmarked reference on the WatchMerit market index. Detailed editorial notes coming soon.