Cartier Santos-Dumont WH100751 Guide

The Cartier Santos-Dumont WH100751 is a 40mm rose gold dress watch with a diamond-set case, a silver-toned Roman-numeral dial and a hand-wound mechanical movement built for a slim, traditional profile rather than sports-watch bulk. This guide covers the specifications, how the WH100751 compares with the white-gold WH100651 and the plainer rose-gold W2020057 in the same family, how it wears, price context and what to check before buying. Bizak & Co. sources the WH100751 to order; the Santos collection lists the configurations we can seek.

Last reviewed on September 28, 2026 by Filip Biczak. Prices are dated observations, not quotes.

Cartier Santos-Dumont WH100751 specifications

Sources: Phillips Watches, whose auction results give independent, dated evidence of how gem-set Cartier Santos references have traded, and Sotheby's watches department, which regularly catalogues Santos-Dumont and Santos de Cartier examples with documented case and movement specifications.

What is the Santos-Dumont and why does it carry Cartier's oldest name?

Cartier dates the Santos design to 1904, when Louis Cartier is said to have made a wristwatch for the aviator Alberto Santos-Dumont so he could check the time without releasing the controls of his aircraft. The modern Santos-Dumont revives that early, slimmer silhouette, distinct from the larger, sportier Santos de Cartier introduced later with exposed bezel screws and an interchangeable bracelet. Where the Santos de Cartier reads as an everyday luxury sports watch, the Santos-Dumont keeps the leather strap, the manual wind and the smaller case that trace back to the original commission, which is why Cartier positions gem-set and precious-metal versions like the WH100751 within the Santos-Dumont rather than the Santos de Cartier range.

WH100751 vs WH100651: rose gold or white gold?

The two references share the same Santos-Dumont proportions and the same diamond-set treatment in different metals. Rose gold reads warmer against most skin tones and is the more requested of Cartier's precious-metal Santos-Dumont colourways generally; white gold gives a cooler, more monochrome look against the silver dial and diamonds. Neither is rarer than the other in any documented sense; the choice is a matter of tone rather than scarcity.

WH100751 vs the plain rose-gold Santos-Dumont

Cartier also sells the Santos-Dumont in rose gold without diamonds, such as the W2020057, a 40mm rose-gold reference with a black Roman-numeral dial and leather strap. The case size and family proportions match the WH100751; the differences are the diamond setting and the dial colour, silver-toned on the WH100751 against black on the plainer reference. Buyers choosing between them are usually choosing how much presence they want from the case rather than a different specification, since both are manually wound, slim, rose-gold Santos-Dumont watches on leather straps.

How does the WH100751 wear?

At 40mm across a rectangular-cushion case, the Santos-Dumont wears smaller than its lug-to-lug diameter suggests, because the case is slim front to back and the leather strap sits close to the wrist. This is a dress watch rather than a tool watch: the diamond setting and the polished rose gold are built for cuffs and jackets rather than daily knocks. Compare case width, length and thickness together rather than relying on a single diameter figure, since a rectangular watch and a round watch quoted at the same size can sit very differently on the wrist. Smaller and larger wrists both tend to carry the Santos-Dumont comfortably given its slim profile, though anyone used to a larger sports watch should expect a noticeably lower-profile piece.

How much is a Cartier Santos-Dumont WH100751? Price context in 2026

• Retail. Cartier's gem-set Santos-Dumont pieces sit toward the upper end of the Santos-Dumont range, reflecting the diamond setting and the precious-metal case; current list pricing should be confirmed with an authorised Cartier boutique, since manufacturer pricing moves and Bizak does not set it.
• Secondary market. Gem-set, precious-metal Cartier references generally see thinner secondary liquidity than the brand's steel Santos de Cartier models, because production runs are smaller and buyers for a specific diamond configuration are fewer.
• Bizak catalogue ask. On 28 September 2026 our sourced catalogue listed the WH100751 brand new at US$35,299, sourced to order.

That figure describes what we saw and will move. Ask for a dated quote for the exact set and condition; our Richard Mille price guide explains the general approach to comparing sourcing quotes against auction and retail evidence, which applies equally to Cartier.

Buying a WH100751: what to check

• Full set. Box, papers, warranty card and any original Cartier documentation; gem-set pieces are more often bought as complete sets than as watches with parts missing.
• Diamond setting condition. Ask for close photographs of the setting for loose or missing stones and uneven prongs, rather than relying on a general "excellent condition" description.
• Movement function. A manually wound movement should wind smoothly with no grinding or slipping at the crown, and should set the time cleanly.
• Case and dial match. Confirm the caseback and dial both read WH100751 and that the metal and dial colour match the reference; a mismatched dial or an altered caseback is a sign the watch has been serviced with non-original parts.
• Strap and clasp. Inspect the leather strap for wear and confirm the folding clasp closes securely; a tired strap is an easy, low-cost fix but should be reflected in the price.
• Service history. Ask what service or repairs are documented, since a manually wound movement depends on regular winding and periodic servicing to keep accurate time.

Our authentication process describes what we inspect before dispatch.

Quick answers

How much is a Cartier Santos-Dumont WH100751?

Bizak's sourced catalogue listed the WH100751 brand new at US$35,299 on 28 September 2026, sourced to order. Retail pricing should be confirmed directly with an authorised Cartier boutique.

Is the Cartier WH100751 automatic or manually wound?

The WH100751 has a manually wound mechanical movement, in keeping with the Santos-Dumont's slim, traditional dress-watch format.

What is the difference between the WH100751 and WH100651?

Both are diamond-set Santos-Dumont references on leather straps; the WH100751 is rose gold and the WH100651 is white gold. The dial layout and case proportions are shared across the pair.

Is the WH100751 the same size as the plain rose-gold Santos-Dumont?

Yes. The diamond-set WH100751 and the plainer rose-gold W2020057 share the same 40mm Santos-Dumont case; the differences are the diamond setting and the dial colour.

How should I compare Santos-Dumont fit against other Cartier models?

Compare case width, length and thickness together, along with strap length. A single diameter figure does not describe how a rectangular-cushion case like the Santos-Dumont's actually sits on the wrist.

Request a WH100751 sourcing quote

Tell us your preferred condition, full-set requirements and timing, plus your budget, through our sourcing enquiry form. We confirm the specific watch, photographs, papers and final price before you commit. Catalogue entries: WH100751 rose gold and diamonds, WH100651 white gold and diamonds, W2020057 plain rose gold; browse the Cartier collection or sell or trade your Cartier.

Related reading: Richard Mille price guide · Audemars Piguet vs Rolex · Rolex price guide · Authenticity guarantee.