Buying a Pre-Owned Military or Dive Watch

Buying a pre-owned watch is increasingly appealing to enthusiasts and collectors. Whether it's a modern dive watch, a military tool watch, or an older model steeped in history, the second-hand market offers a vast selection, often at more affordable prices than new watches. But this opportunity also comes with very real risks: modified watches, non-original parts, hidden wear, compromised water resistance, or dubious provenance. In the case of dive and military watches, extra vigilance is required. These watches are designed for action and have often been worn extensively. A good purchase, therefore, is not based solely on aesthetics or price, but on a comprehensive and methodical analysis.

Understanding the Pre-Owned Market

Before even looking at an advertisement, it is essential to understand the market. A pre-owned watch can be:

• Recent (a few months or years old),
• "Full set" (box, papers, accessories),
• Or older, sometimes without any documentation.

In the world of military and diving watches, the absence of a box or papers isn't necessarily a deal-breaker, especially for older models. However, for a modern watch, it can significantly impact its value, resale potential, and traceability.

• It's also important to distinguish between:
• Recent pre-owned watches, often still under warranty,
• Pre-owned watches, showing signs of wear,
• Vintage watches, where wear and tear is part of the story… provided it's genuine.

Verifying authenticity: the top priority

The first step should always be to verify authenticity. The market for diving and military watches is particularly affected by counterfeits, "frankenwatches" (watches assembled with disparate parts), and modified models.

Key points to check:

• Consistency between the case, dial, hands, and bezel,
• Match between the serial number and the advertised model,
• Conformity of the movement to the reference,
• Absence of anachronistic parts (especially on vintage watches).

A dial that looks too new on an old watch, an incorrect bezel, or non-compliant hands should immediately raise suspicions.

Examine the condition of the case and finish

The case is one of the most important elements. On a dive or military watch, it often tells the story of the watch.

Look carefully for:

• Deep scratches or pronounced dents,
• Overly rounded edges, a sign of excessive polishing,
• Discrepancies in finish between certain areas (inconsistent polished/brushed),
• Corrosion, especially on models that have been exposed to seawater.

A case that is too "perfect" can sometimes be just as suspicious as a heavily worn one. In some cases, poorly executed polishing has caused the watch to lose some of its character and value.

The Bracelet: Often Neglected, But Crucial

The metal bracelet is one of the most expensive parts to replace. You should check:

• The stretch of the links,
• The condition of the pins and screws,
• The buckle (the area most exposed to impacts),
• The presence of all the original links.

On a military or dive watch, a very worn bracelet can represent a significant hidden cost. Conversely, a new bracelet on a heavily worn watch can raise questions.

Water Resistance: Never Take Their Word

A used dive watch is never inherently waterproof, even if the seller claims otherwise. The seals age, dry out, and lose their effectiveness.

Before any immersion:

• Arrange for a water resistance test by a watchmaker,
• Anticipate the possibility of replacing the seals,
• Consider a complete service if the watch has not been recently maintained.

This point is crucial: water ingress can destroy a movement in seconds.

Movement and Service History

The heart of the watch deserves as much attention as its appearance. Always ask for:

• The date of the last service,
• The invoice or proof of service,
• The type of work performed (simple check or full service).

A military or dive watch that hasn't been serviced for several years may still be working… but at the cost of invisible internal wear. A service can represent a significant cost, which should be factored into the overall budget.

Price: Too Good to Be True?

Price is often the deciding factor in a purchase. However, an unusually cheap watch should always raise suspicion.

Before buying:

• Compare prices on several platforms,
• Analyze the differences based on condition, year, and accessories,
• Beware of “bargains” without a clear explanation.

When in doubt, it's better to pay a little more for a reliable watch than to try to save money on a risky purchase.

Choosing the Right Seller

The seller is almost as important as the watch itself.

Prioritize:

• Recognized professionals,
• Platforms with secure payment systems,
• Transparent private sellers with a history and ratings.

A good seller will:

• Provide detailed photos,
• Answer questions precisely,
• Offer a return policy.

Conversely, pressure to buy quickly is a red flag.

Documents, Box, and Accessories

For a modern watch, the presence of the box and papers is a real plus:

• better traceability,
• Higher resale value,
• Warranty sometimes still valid.

For a military or vintage watch, the absence of documents is not uncommon, but should be compensated by historical accuracy and a fair price.

Think about resale

Even if the purchase is driven by passion, it's wise to consider future resale:

• Overall condition,
• Authenticity of the parts,
• Popularity of the model,
• Ease of maintenance.

A well-purchased watch is easy to resell. A questionable watch often becomes unsellable.

Editor: Éric Barse

Journalist, entrepreneur, and founder of the websites www.cafe-racer-only.com and www.scooter-3-roues.com, Eric Barse divides his time between his passions: motorcycles, travel, and watches. A graduate of the Saint-Cyr military academy and the 2nd RPIMA (Parachute Regiment) before pursuing a career in communications and digital media, he has a true passion for authentic watches that have accompanied his two-wheeled adventures for many years, from the Indian Ocean to Africa and Latin America!