GrailAtlasAn independent mechanical watch reference
Français
Common#2 in familyOfficial press photos

Condition affects price

Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.

New Old Stock
Unworn example retaining original packaging, tags, and warranty documentation.
+30–50% vs median
Unpolished
Worn but the case has never been polished; original brushed and polished surfaces are intact.
+15–25% vs median
Polished
Case has been professionally or amateur polished at some point; edge definition is softened.
-15 to -5% vs median
Recently Serviced
Movement has been recently serviced with documented service records; case condition varies.
At median
Project
Needs service, has dial or hand issues, non-original parts, or other remediation before daily wear.
-50 to -25% vs median

Full condition grading guide →

Market price

$28,000$42,000
gold·2026 Q2
Price trend chart coming soon

The 1815 Up/Down adds a power reserve to the pared-back 1815 family; secondary prices are firm because the combination of outsize date and reserve display is considered one of the most useful Lange complications.

Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.

Movement tier: unclassified · caliber A. Lange & Söhne Cal. L051.2: manual-wind with up/down power reserve, 21,600bph, 72h PR, 29j; Lange flagship feature set · 72h power reserve (3 days)
Versatile size: fits most wrists (6–7.5 in / 15–19 cm)
39 mm case. The sweet spot for the broadest range of wrist sizes. Neither too dainty nor too bold.

Not yet rated

Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal: the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.

Search pre-owned listings

Chrono24
eBay (sold listings)
WatchBox

Authentication

The 1815 Up/Down is a clean, legible Lange reference with low counterfeit pressure; the Cal. L051.2 German silver three-quarter plate with Glashütte ribbing and the power-reserve arc at 3 are the authentication anchors.

Known issues in the market
  • The 1815 name references Ferdinand Adolph Lange's birth year; Arabic numerals only on this reference (no applied indices); any dial with applied metal indices is the wrong dial.
  • The outsize date is NOT present on the 1815 Up/Down; the outsize date is a different complication found on the Lange 1 family; a date aperture on the dial of a claimed 1815 Up/Down is incorrect.
  • Cal. L051.2 German silver three-quarter plate is the correct movement; any Swiss-made or nickel-silver plated movement is incorrect.
  • Power-reserve "Up/Down" arc at 3 o'clock is the defining feature of this reference; an 1815 without a power reserve indicator is the standard 1815 (not the Up/Down variant).
AreaWhat to checkWhat is correctRed flag
dialArabic numeral dial (no applied indices)Printed Arabic numerals at all twelve positions; no applied metal index pieces; numerals in the specific Lange serif font; clean white or silver dial surface; "1815" text below 12Applied metal indices at any hour position (wrong dial style for 1815); any date aperture present; numerals in incorrect font or weight
dialPower reserve arc at 3 o'clock"Up/Down" power reserve arc indicator at 3 o'clock position; arc covers approximately 90-degree sector; pointer advances smoothly as power reserve depletes; "72H" marking at full-wind positionMissing power reserve indicator (indicates standard 1815, not Up/Down); power reserve arc at incorrect position; "72H" marking absent or at incorrect position
dialSubsidiary seconds at 6 o'clockSmall subsidiary seconds register at 6 o'clock; seconds hand sweeps; no date complication at 3 o'clock; dial otherwise unclutteredDate aperture at 3 o'clock (indicates a different movement or variant); seconds hand absent; any additional complication beyond power reserve and seconds
movementCal. L051.2 German silver three-quarter plate via casebackExhibition caseback shows warm grey-brown German silver three-quarter plate; Glashütte ribbing (parallel stripes) at consistent spacing; "A. LANGE & SÖHNE GLASHÜTTE I/SA" on movement; "CAL. L051.2" text; blued steel screwsCool or white bridges (Swiss movement or nickel-silver substitutes); irregular Glashütte ribbing; Cal. L051.2 text absent; black or chrome screws instead of blued steel
movementBlued steel screwsThermally blued screws throughout the movement; vivid blue-violet color; uniform bluing across all screws; polished and beveled screw headsAny screw without blue coloration; uneven bluing between screws; flat (unbeveled) screw head edges
case38.5mm case and yellow gold or white gold correctnessCase diameter approximately 38.5mm; ref. 234.026 is yellow gold; hallmarks ("750") on caseback; case shoulders crisp with no polish roundingCase diameter under 37mm or over 40mm; missing gold hallmarks; rounded case shoulders indicating polishing; wrong metal (steel or silver in a claimed gold reference)
Common legitimate replacements
  • Alligator leather straps are the most commonly replaced component; Lange-issued replacement straps with the correct buckle maintain value.
  • Service history from Lange or an authorized Lange service center is strongly advisable; Cal. L051.2 is a complex movement requiring specialist knowledge.
Expert resources: A. Lange & Söhne authorized dealers authenticate via serial. TimeZone Lange forum and the Watchuseek Lange section cover 1815 Up/Down authentication. A qualified Lange-trained watchmaker can verify Cal. L051.2 in full.

Authentication guide

Last reviewed June 2026

The 1815 Up/Down pairs a traditional subsidiary seconds layout with a sector-style power reserve indicator. The clean two-register dial is one of the simplest in the Lange catalog and a strong gateway reference. Dial condition and movement finishing are the primary inspection points.

Known reproduction risks

toggle
LOW

The 1815 Up/Down is not widely reproduced. The movement finishing is the definitive disqualifier for any non-genuine example.

  • Three-quarter plate absent from any movement visible through the caseback
  • Glashütte stripes absent or machine-applied
  • Power reserve sector with incorrect arc geometry or wrong typeface for "Up/Down"

Dial variants by era

toggle
EraDescriptionIdentifiers
2000 to present (white gold 234.026 and yellow gold 234.021)Argenté or gold dial with subsidiary seconds at 6 o'clock and a sector power reserve indicator at 12 o'clock. The 1815 family uses the traditional straight-line layout with railroad minute track and applied Arabic numerals.
  • Power reserve sector at 12 o'clock with "Up/Down" text in two arcs across the sector field
  • Subsidiary seconds at 6 o'clock with a fine minute chapter ring at the outer dial edge
  • Applied Arabic numeral hour markers; the numerals are open-face without lume plots on most production examples
  • "1815" text just above the sub-seconds dial; the typeface references the birth year of Adolph Lange
  • No outsize date on this reference -- date-bearing 1815 variants have a different reference number

Service part flags

toggle
Power reserve sector

Original: Fan-shaped sector indicator occupying the 10 o'clock to 2 o'clock upper dial arc. The sector background is satin-finished with "Up" and "Down" applied in the Lange typeface. The indicator hand is a fine blued steel pointer.

Replacement tells
  • Any printed or decal-applied "Up/Down" text rather than applied raised lettering
  • Power reserve hand that does not match the blue tone of the subsidiary seconds hand
  • Sector background finish that differs from the rest of the dial surface in reflectance
Applied hour numerals

Original: Open-face Arabic numerals applied individually. They are white gold or yellow gold depending on case metal. Each numeral is finished on all four vertical sides and the top face.

Replacement tells
  • Numerals with rounded or flat side edges rather than hand-chamfered sides
  • Any numeral that sits at a fractional angle to its correct position under 10x inspection
  • Adhesive residue visible at the base of a numeral under magnification

Case back markings

toggle
2000 to present
  • Exhibition caseback displaying Cal. L051.2
  • "A. Lange & Söhne" and "Glashütte i/Sa." on the three-quarter plate
  • Three-quarter plate in German silver with Glashütte stripe finishing
  • Hand-engraved balance cock unique to each example
  • Gold chatons at the jewel settings; these are a Lange signature element visible from the caseback

Movement tells

toggle
  • The power reserve on Cal. L051.2 is 42 hours; a watch that reads "Up" with less than 24 hours of reserve after full winding indicates a mainspring issue.
  • Glashütte gold chatons at the jewels are polished on all exposed surfaces; aftermarket service can leave them scratched if a watchmaker used incorrect tools.
  • The hand-engraved balance cock engraving depth should be consistent under magnification; re-engraving after a caseback polish is sometimes detectable by inconsistent line depth.
Sources: A. Lange & Söhne — 1815 reference family documentation; Fratello Watches — 1815 Up/Down buyer guide.

You might also like

A. Lange & Söhne 1815 Chronograph Ref. 414.028, black dial, gold-white case
A. Lange & Söhne
1815
Ref. 414.028
A. Lange & Söhne
1815
Ref. 297.025
A. Lange & Söhne
1815
Ref. 235.026
Grand Seiko Snowflake SBGA211 Ref. SBGA211, white dial, titanium case
Grand Seiko
Heritage Spring Drive
Ref. SBGA211
Grand Seiko Shunbun SBGA413 Ref. SBGA413, rose dial, steel case
Grand Seiko
Heritage Spring Drive
Ref. SBGA413
A. Lange & Söhne Lange 1 Ref. 191.039, silver dial, gold-rose case
A. Lange & Söhne
Lange 1
Ref. 191.039

Buying guidance

← Back to Grail Atlas