The 1815 Flyback Chronograph is Lange's flagship sport complication with a column-wheel flyback movement built entirely in-house; secondary prices are firm because production is tightly controlled and the movement quality is beyond criticism.
Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.
Movement tier: unclassified · caliber A. Lange & Söhne Cal. L101.2: manual-wind flyback chronograph, 18,000bph, 60h PR, 363 parts; column wheel, vertical clutch, flyback pusher at 10; lever-set outsize date · 60h power reserve (2.5 days)
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
41.9 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.
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The flyback reset must be instantaneous on the lower pusher; any hesitation requires Lange factory service.
Known issues in the market
The flyback return spring is the most delicate service component; any hesitation in the flyback reset indicates service.
Manual-wind Cal. L101.2 must be wound daily; verify the mainspring is in good condition.
Area
What to check
What is correct
Red flag
crown
Flyback chronograph reset function
Lower pusher resets and restarts the chronograph instantaneously; hands return to zero cleanly with no stutter
Any hesitation in the flyback reset; hands that return to zero slowly or incompletely
caseback
Cal. L101.2 manual-wind with Lange decoration
Cal. L101.2 visible; German silver plate, Glashütte stripes, and engraved balance cock confirm Lange manufacturing
Any caliber other than L101.2; movement without full Lange decoration standards
dial
1815 subdial chronograph layout
Clean subdial layout with running seconds, 30-minute counter, and flyback pushers at 2 and 10; all hands present at zero
Any missing subdial hand; hand positioning inconsistent with zero at rest
Common legitimate replacements
The 1815 strap is a standard Lange strap; replacement is common and documented.
Expert resources: A. Lange and Söhne 1815 Flyback 297.025 product documentation. Lange Cal. L101.2 technical specifications.
Authentication guide
Last reviewed June 2026
The 1815 Flyback is a column-wheel flyback chronograph in the traditional 1815 dress-watch format. It is one of the most collector-focused Lange references: no date, no power reserve, just the flyback mechanism in a 39.5mm case with a clean three-register dial.
Known reproduction risks
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LOW
The 1815 Flyback is not reproduced. The flyback mechanism and the movement finishing are both beyond current replica production capabilities.
Movement without three-quarter plate
Flyback function missing or replaced with a standard reset (stop-reset-start instead of reset-and-restart in one motion)
30-minute counter at 12 with incorrect scale graduation direction
Dial variants by era
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Era
Description
Identifiers
2014 to present (pink gold 297.032 and white gold 297.026)
Silver argenté dial with three registers: 30-minute counter at 12 o'clock, small seconds at 6 o'clock, and the running-seconds in the main central hand. The 12 o'clock register is unusual for a three-register chronograph and is a defining visual signature.
30-minute counter at 12 o'clock position -- most chronographs place this counter at 3 or 9; the 12 o'clock placement is the 1815 Flyback signature
Small seconds at 6 o'clock, running continuously when the watch is going
No date, no outsize date, no power reserve indicator
"1815 Flyback" text at 6 o'clock above the small seconds sub-register
Applied Arabic numerals at each hour; Lange's open-face numerals without lume plots
Pump pushers at 2 and 4 o'clock; the 2 o'clock pusher activates the flyback reset
Service part flags
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30-minute counter at 12
Original: Sub-register at 12 o'clock with a 30-minute scale. The sub-dial background is silver and the hand is blued steel matching the other chronograph hands. The register is set below the main dial plane.
Replacement tells
Sub-dial background with a different finish than the main dial surface
30-minute scale with incorrect graduation spacing -- at 12 o'clock, the scale reads counter-clockwise which is an uncommon graduation direction
Hand color that does not match the blue tone of the small seconds and central chronograph hands
Flyback pusher at 2 o'clock
Original: Pump pusher at 2 o'clock. When pressed during a running chronograph, the central seconds hand immediately resets to zero and restarts. The reset and restart are instantaneous with no intermediate pause.
Replacement tells
Flyback that resets but does not immediately restart -- a two-step behavior (stop, reset, then manually restart) indicates the mechanism is not functioning as designed
Pusher with incorrect stroke depth or spongy engagement compared to the 4 o'clock pusher
Case back markings
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2014 to present
Exhibition caseback displaying Cal. L101.1
"A. Lange & Söhne" and "Glashütte i/Sa." on the three-quarter plate
Three-quarter plate in German silver with Glashütte stripe finishing
Column wheel visible from caseback; should show clean, individually hand-beveled teeth
Hand-engraved balance cock unique per example
Movement tells
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The flyback function on Cal. L101.1 uses a column wheel identical in principle to the Datograph but in a different layout. The column wheel teeth visible through the caseback must show hand-beveled edges.
A correctly functioning flyback shows zero displacement of the central seconds hand between the end of the reset and the restart; any visible creep before restart indicates worn detent springs.
Glashütte stripe finishing is required on all surfaces of the three-quarter plate; no exceptions regardless of service history.
