Zenith introduced the Zenith Montre d’Aéronef Type 20 5011K in 2012. This 250-unit limited Pilot Type 20 pays tribute to the original Montre d’Aéronef, an iconic aircraft clock from the WW2 era. This Zenith Pilot watch bridges past and present in more than one way. Additionally, it is the first modern release to revive the Zenith Pilot Type 20 branding. With its oversized case, vintage-inspired design, and a Zenith 5011K calibre originally built for marine chronometers, this Chronometer watch embodies both aviation heritage and high-precision horology.
Design - 32 / 100
This Zenith Montre d’Aéronef stays true to its aviation instrument roots, retaining key elements that define historical Pilot Type 20 designs. The watch retains many classic elements that harken back to its aviation roots, including the black dial, contrasting large numerals and “cathedral” hands, as well as the iconic onion crown. Every feature is larger than life, making it an eye-catching piece.
The placement of sub-dials and the incomplete “9” may not appeal to those who prefer symmetry. However, this is a direct result of using the Zenith 5011K calibre, a movement originally designed for a marine chronometer or a Zenith pocket watch. To position the crown on the right, Zenith rotated the 5011K by 90 degrees clockwise, shifting the small seconds sub-dial to 9 o’clock and partly blocking the numeral. Opposite sits the power reserve indicator, displaying remaining energy in 6-hour increments.
Available in titanium or rose gold, both variants feature polished and brushed finishes, with a smooth polished bezel ensuring focus on the dial. Case-matching buckles are provided with the dedicated leather strap. The engraved caseback reveals the decorated Zenith 5011K movement, a treat for enthusiasts. A polished side plaque displays the individual production number out of 250.
The Zenith Montre d’Aéronef Type 20 5011K has substantial proportions that can be a double-edged sword. While it emphasises its rugged, aviation-inspired look, the size is more suited to a Zenith pocket watch than a wristwatch. This is a bold, uncompromising timepiece, catering to niche collectors with an affinity for historical pilot watches.
Utility - 35 / 100
The main attraction of the Zenith Montre d’Aéronef Type 20 5011K is undoubtedly its movement. The manual wind Zenith 5011K calibre offers a 48-hour power reserve, conveniently displayed at the 3 o’clock position. However, this is not a daily-wear watch—it is a statement piece first, and a functional tool second.
With sapphire glass on both sides, the watch has excellent scratch resistance. The titanium version offers durability and reduced weight, while the rose gold variant is heavier and more prone to patina as the softer metal is more prone to wear. Water resistance is rated at 30 metres — sufficient for splashes but unsuitable for submersion. Keep the original leather strap away from saltwater! Not that anyone would take this Zenith Pilot watch diving—it remains an “aircraft clock” at heart.
Legibility is exceptional. Large Pilot Type 20 numerals and “cathedral” hands coated in Super-LumiNova ensure readability in low-light conditions. The oversized Zenith Pilot Type 20 onion crown allows for easy manual winding and adjustments, even while wearing gloves. A pin and buckle strap mechanism is traditional but lacks the security and quick adjustment of a locking deployant clasp. Additionally, while a rotating bezel is not essential for a Zenith Pilot watch, it could have provided extra functionality. Easily the biggest drawback is the sheer size — unless you have a large wrist or enjoy oversized statement pieces, the Zenith Montre d’Aéronef Type 20 5011K is impractical for daily wear. Furthermore, its exclusivity and price tag firmly position it as a Zenith Pilot watch for collectors rather than everyday users.
Craft - 43 / 100
The Zenith 5011K calibre is one of the defining features of this Pilot Type 20. Originally produced between 1960 and 1990, this movement was once recognised as the most accurate chronometer tested by the Neuchâtel Observatory in 1967. With COSC certification, its accuracy remains exceptional even today.
Operating at 18,000 beats per hour (2.5 Hz) with 19 jewels and 134 parts, the Zenith 5011K is a relatively simple movement compared to modern calibres. While this is adequate, it may not match the complexity or modernity of more contemporary movements. Considering the age of these mechanisms, this watch might not appeal to those seeking the latest advancements in horology, but more to those who share a bit of nostalgia for the vintage. The Zenith Montre d’Aéronef Type 20 pairs this historic movement with modern finishing and high-quality construction. Thus, servicing should not be an issue, especially considering these are generally simple mechanisms with fewer, larger parts compared to more modern equivalents.
Both the Montre D’Aeronef Type 20 and the 5011K calibre have important heritage on their own. Brought together in this form, it signifies the end of an era as well as the beginning of a new one. 5011K movements that were left over are used as a final send-off, while the Montre D’Aeronef Type 20 nomenclature is revived and expanded with many different variants within Pilot Type 20 collection.
This watch is available in two main references:
- Ref 18.2420.5011/21.C723 – rose gold case
- Ref 95.2420.5011/21.C723 – titanium case
The choice between rose gold and titanium depends on preference: the former exudes luxury, while the latter offers better practicality. The 27mm-wide brown calfskin leather strap is featured on both variants with a case-matching buckle. Without being able to check exact numbers, rose gold cased variants could be a bit rarer than their titanium siblings for this model.
While craftsmanship is undeniable, the Zenith Montre d’Aéronef Type 20 5011K remains a pure timekeeper — no additional complications beyond the power reserve display. The Zenith 5011K calibre, despite being well-respected, is a tribute to mid-20th-century horology rather than cutting-edge innovation. This is a watch for connoisseurs who appreciate precision, aviation history, and traditional craftsmanship.
Value - 48 / 100
The high acquisition cost makes this a challenging buy for casual enthusiasts. While the Zenith Montre d’Aéronef Type 20 5011K has seen price fluctuations, it generally holds strong value, starting around €20,000. Having limited production of just 250 pieces that are individually numbered potentially allows for future appreciation in value and adds an element of exclusivity. There are an additional 20 pieces across three even rarer variants (still equipped with 5011K calibre), not considered here.
With deep historical ties, any Zenith Pilot watch carries significant intrinsic value. However, finding a complete full set is crucial, as a missing box or especially papers can significantly affect resale value. Due to poor second-hand availability, acquiring one can be difficult, but rarity could drive demand in the long run. In terms of price-to-performance ratio, this is an expensive watch with a limited scope — it’s large, historically significant and extremely accurate, but lacks modern features. Rose gold may bring more of a premium but in this price range you should pick your favourite case (if multiple choices are on the table) or whichever is available.
Competition is minimal. Few brands offer aviation-inspired watches in this extreme size category. The IWC Big Pilot 55 and converted pocket watches might serve as alternatives, but no brand quite replicates what the Zenith Montre d’Aéronef Type 20 5011K offers. However, for those seeking a more practical Zenith Pilot watch, modern El Primero- or Elite-powered models might be the better choice.
Collector Score - 39 / 100
While impractical for most, the Zenith Montre d’Aéronef Type 20 5011K is a unique collector’s piece that bridges Zenith’s aviation and Zenith pocket watch legacy in spectacular fashion. Its lack of modern refinements is offset by historical significance and craftsmanship. This is an ideal watch for those who cherish early aviation heritage, pocket watches, and precision timekeeping. Individually numbered and visually striking, this Zenith Montre d’Aéronef Type 20 is impossible to ignore.