A. Lange & Sohne 1815 Tourbillon 730.079F Guide

The A. Lange & Söhne 1815 Tourbillon 730.079F is a 39.5 mm platinum watch with a white enamel dial, a manually wound calibre L102.1 combining a one-minute tourbillon with a stop-seconds function and Lange's ZERO-RESET mechanism, and it is limited to 100 pieces. It sits within Lange's 1815 collection, the brand's line of traditionally styled watches named for Ferdinand Adolph Lange's birth year. This guide covers the specifications, what stop-seconds and ZERO-RESET actually do, how the 730.079F compares with other complicated 1815 references, price context and what to check before buying. Bizak & Co. sources the 730.079F to order; the pre-owned and sourced watches collection lists the configurations we can seek.

Last reviewed on September 27, 2026 by Filip Biczak. Prices are dated observations, not quotes.

A. Lange & Söhne 1815 Tourbillon 730.079F specifications

Source: A. Lange & Söhne, 1815 Tourbillon in 950 platinum and the 1815 collection page, checked September 2026.

What do stop-seconds and ZERO-RESET do on a tourbillon?

Stop-seconds halts the seconds hand when the crown is pulled out to set the time, which lets the wearer set the watch to the exact second against a time reference, a feature many simpler watches lack entirely. Lange's ZERO-RESET goes further: pulling the crown out on a ZERO-RESET movement returns the seconds hand instantly to zero, rather than leaving it wherever it happened to stop, so the watch can be restarted precisely on the next full minute. Combining ZERO-RESET with a tourbillon is mechanically demanding, since the tourbillon cage itself has to be halted and reset without disturbing its regulation, and it is one of the details that separates the 1815 Tourbillon from a simpler tourbillon that only stops when the mainspring runs down.

1815 Tourbillon vs 1815 Rattrapante vs 1815 Grand Complication: which platinum 1815?

The 1815 Tourbillon sits well above the Rattrapante's single-complication chronograph but far below the Grand Complication, which stacks four major complications into one movement. Within Lange's own range, the 730.079F represents the point where a tourbillon alone, finished to the brand's usual standard and combined with the ZERO-RESET refinement, justifies a price roughly 40 percent above a platinum split-seconds chronograph, without approaching the Grand Complication's multi-complication price.

How does the 39.5 mm platinum case wear?

At 39.5 mm and about 11.3 mm thick, the case sits at a size Lange considers classically proportioned for a dress watch, smaller than most contemporary sports watches but comfortably legible. Platinum is notably denser than gold at the same volume, so the case carries more heft on the wrist than its dimensions suggest, a characteristic collectors specifically seek out in Lange's platinum pieces. The white enamel dial is fired rather than printed, which gives it a depth and slight texture under close inspection that a painted dial does not have, though enamel is also more prone to hairline cracking from a hard knock than a lacquered dial. The tourbillon aperture, generally positioned low on the dial in Lange's 1815 Tourbillon references, gives the wearer a view of the escapement in motion, which is as much the point of owning the watch as the timekeeping benefit the tourbillon is historically credited with.

Why A. Lange & Söhne uses solid gold or platinum for tourbillon bridges

Lange finishes its movements, including the tourbillon cage and bridges on the 730.079F, to the brand's own in-house standard of hand-finishing, which includes polished bevels, hand-engraved balance cocks and the brand's signature three-quarter plate construction on many of its calibres. This level of finishing is a large part of what separates a Lange movement's price from a more industrially produced tourbillon elsewhere in the market, alongside the German silver components Lange uses rather than the rhodium-plated brass more common among other manufacturers. Buyers new to Lange should expect the movement, visible through the sapphire case back, to be as much a part of the ownership experience as the enamel dial on the front.

Price, availability and condition

Bizak & Co. sources watches to order; this catalogue entry is not confirmation that a specific example is on hand for immediate delivery. On 27 September 2026 our sourced catalogue listed the 1815 Tourbillon 730.079F at US$199,999 brand new, against US$139,199 for the platinum 1815 Rattrapante and US$559,999 for the pink gold 1815 Grand Complication, all sourced to order and subject to change. Before purchase we confirm the actual watch, recent photographs, condition, included accessories, price, warranty coverage and expected timing; compare any dated quote against shipping, applicable tax and financing cost. As a 100-piece limited edition, individual examples may carry a premium or discount relative to the catalogue figure depending on the specific piece offered and its condition. Lange does not publish a single fixed retail price across every market for a limited tourbillon reference in the way some larger houses do for a production model, so a dated sourced figure like the one above, rather than a general retail assumption, is the more reliable starting point for planning a budget.

Is the 1815 Tourbillon a good investment?

A. Lange & Söhne's high-complication limited editions have built a strong collector following since the brand's 1990s relaunch, and platinum tourbillon references in particular have generally held their standing well among specialist buyers, though the market for any single 100-piece edition is inherently thinner than for a production sports watch. Buy the 730.079F for the movement, the enamel dial and the ZERO-RESET mechanism, not as a speculative flip; a full-set example with box, papers and the numbered certificate will always be easier to place with a specialist buyer than a watch-only piece. Ask for a written cash-buy assessment before committing if resale matters to you. Lange's tourbillon and grand complication references occupy a smaller, more specialist tier of the market than the brand's simpler 1815 or Saxonia references, and buyers considering the 730.079F specifically for its resale potential should weigh that narrower buyer pool against the piece's undeniable technical and finishing appeal.

Buying a used 1815 Tourbillon 730.079F: what to check

• Numbered certificate. A 100-piece limited edition should come with its numbered certificate matching the case back or movement engraving; ask for this in writing before paying a deposit.
• ZERO-RESET function. Ask the seller to demonstrate the crown-out reset; the seconds hand should return instantly to zero rather than simply stopping wherever it was.
• Enamel dial condition. Inspect closely under strong light for hairline cracks, which fired enamel can develop from impact and which are not always visible at a glance.
• Case condition. Platinum shows wear differently from gold or steel; check the case edges and lugs for dents or excessive polishing.
• Strap and buckle. Alligator leather ages and cracks over time; a worn strap is a straightforward replacement but should be priced into any offer.
• Movement service history. Ask for the last service date; a tourbillon movement with ZERO-RESET is more complex to service correctly than a standard automatic movement.
• Price against the band. A full-set example offered well under the catalogue range above is the single most reliable warning sign.

Our authentication process describes what we inspect before dispatch, and a high-complication Lange movement benefits from an inspection specifically experienced with the brand's tourbillon and ZERO-RESET construction rather than a generalist check alone.

Quick answers

How much is an A. Lange & Söhne 1815 Tourbillon 730.079F?

Bizak's sourced catalogue listed the 730.079F at US$199,999 brand new on 27 September 2026, against US$139,199 for the platinum 1815 Rattrapante and US$559,999 for the pink gold 1815 Grand Complication, all sourced to order.

What is ZERO-RESET?

A Lange mechanism that returns the seconds hand instantly to zero when the crown is pulled out to set the time, rather than simply stopping it wherever it happened to be, allowing precise restarting on the next full minute.

How many 1815 Tourbillon 730.079F watches were made?

The edition is limited to 100 pieces, each with a numbered certificate.

Is the 1815 Tourbillon manual or automatic?

Manual winding. The calibre L102.1 is hand-wound, with 72 hours of power reserve.

What is the difference between the 1815 Tourbillon and the 1815 Rattrapante?

The Tourbillon has a one-minute tourbillon with stop-seconds and ZERO-RESET; the Rattrapante has a split-seconds chronograph instead. They are different complications within the same 1815 case family, and both are offered in platinum, though at different price points reflecting their respective complications.

Request a 1815 Tourbillon 730.079F sourcing quote

Tell us whether you need the numbered certificate and full set, your preferred condition, plus your budget and timing, through our sourcing enquiry form. We confirm the specific watch, photographs, papers and final price before you commit. Catalogue entries: 1815 Tourbillon 730.079F, 1815 Rattrapante platinum; browse the pre-owned and sourced watches collection or sell or trade your watch.

Related reading: Girard-Perregaux Vintage 1945 Infinity Edition guide · Patek Philippe price guide · Pre-owned watches · Sell or trade your watch.