Hamilton Khaki Navy Scuba vs. Tissot Seastar 1000: Which $1,000 Diver Wins?

When you have $1,000 to spend on a Swiss diver, two names inevitably rise to the top: the Hamilton Khaki Navy Scuba and the Tissot Seastar 1000. Both brands sit under the Swatch Group umbrella, both offer 80 hours of power reserve, and both share a 43mm footprint. However, on the wrist, these two watches couldn’t feel more different. One is a rugged tool watch that feels like it belongs on a military vessel; the other is a “desk diver” with a polished, luxury-adjacent aesthetic.

In this guide, I’ll break down the nuances of these two titans to help you decide which belongs in your collection.

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Hamilton Khaki Navy Scuba vs Tissot Seastar 1000 Comparison

At a Glance: The Quick Specs & Takeaway

Feature	Hamilton Khaki Navy Scuba (43mm)	Tissot Seastar 1000 (43mm)
Movement	Hamilton H-10	Powermatic 80
Power Reserve	80 Hours	80 Hours
Water Resistance	300 m	300 m
Bezel	Ceramic (Matte / Fine Teeth)	Ceramic (Polished / Bold Teeth)
Case Back	Solid Steel (Engraved)	Exhibition (See-through)
Price	$995 - $1,225	$750 - $825
Best For	Tool-watch purists & Military Style	Modern Style (“Desk Dive”)

Choose the Tissot Seastar 1000 if: You want the best “bang for buck.” It offers a more modern, polished look that transitions perfectly from the weekend to the office. The exhibition case back and lower price point make it the ideal choice for someone’s first serious Swiss automatic.

Choose the Hamilton Khaki Navy Scuba if: You prefer a “Tool Watch” with military DNA. It feels more robust, the dial is more functional with its 24-hour scale, and it lacks the “flashiness” of the Tissot. It’s for the enthusiast who wants their watch to look like it has a job to do.

Dial Aesthetics: Military Utility vs. Modern Depth

Hamilton Khaki Navy Scuba

The Hamilton dial is busy in the best way possible. It features a gradient blue finish and includes a 24-hour military time scale—a nod to Hamilton’s history as a supplier to the US Armed Forces. The red-tipped second hand adds a “pop” of tactical color. It uses a matte-heavy finish that cuts down on reflections, making it highly legible in direct sunlight.

Tissot Seastar 1000

Tissot goes for a cleaner, “luxe” look. By removing the military scale, the dial feels more spacious. The date window is moved to the 6 o’clock position, providing a symmetrical balance that the Hamilton lacks. The circular hour markers are larger and bolder, giving it a look reminiscent of the Rolex Submariner or Omega Seamaster.

Bezel & Ergonomics: Which One Can You Actually Grip?

Both watches feature ceramic bezel inserts, which are virtually scratch-proof—a huge plus at this price point.

Hamilton Khaki Navy Scuba

The Hamilton opts for a more refined, smaller-toothed bezel. While it looks more “elegant,” some enthusiasts find it slightly harder to grip compared to the Tissot. However, the Hamilton’s bezel action feels more “mechanical” and precise. The unidirectional bezel on the Hamilton Khaki Navy Scuba exhibits a classic design commonly seen on dive watches, known as the count-up bezel. This bezel is engraved with a 60-minute scale, traditionally utilized by divers to track their time underwater.

Tissot Seastar 1000

The Tissot uses a bold, blocky font on the bezel and deep “teeth” on the edge. This splits the visual focus between the dial and the bezel, and the bezel itself is incredibly easy to grip and turn, even if your hands are wet. Otherwise, the Tissot Seastar’s bezel is very similar to the Hamilton Khaki Navy Scuba: uni-directional count-up ceramic bezel, with a 60-minute scale engraved.

Case & Wrist Presence: The “Feel” Factor

Hamilton Khaki Navy Scuba

The brushed stainless steel case of the Khaki Navy Scuba has a case width of 43 mm, a lug-to-lug distance of 52 mm, and a lug width of 22 mm. The thickness of the watch is 12.53 mm. It offers an impressive water resistance of up to 300 meters (30 bars), which is supported by the screw-down crown.

Tissot Seastar 1000

Tissot Seastar 1000 is also 43 mm in width, however, the lug-to-lug distance is 49.6 mm, therefore slightly better for smaller wrists than the Hamilton. The lug width is at 21 mm, and the thickness of the watch is 12.7 mm. One difference is that the caseback is a see-through caseback, giving us a glimpse of the automatic movement.

The Tissot’s 300 meters water resistance is on par with the Hamilton.

Expert Tip:

If you have a wrist smaller than 6.75 inches, the Tissot will actually likely fit you better despite the large 43mm diameter, because the lugs don’t overhang as much as the Hamilton’s.

The Movement: Not All “80-Hour” Engines Are Equal

Both watches use movements based on the ETA C07 architecture, but there is a technical difference often missed:

Hamilton Khaki Navy Scuba

The H-10 movement is a reliable three-hand automatic movement that is based on the ETA C07.611 caliber, and provides an impressive power reserve of 80 hours. This movement uses a traditional 25-jewel construction. It now includes a Nivachron hairspring, which makes it highly resistant to magnetic fields (your phone, laptop, etc.).

Tissot Seastar 1000

Tissot’s automatic movement, the POWERMATIC 80.111 caliber is based on the ETA C07.111. While this 23-jewel movement also offering 80 hours of power and a Nivachron spring, Tissot often uses high-tech synthetic (plastic) parts in the escapement of certain Seastar models to keep costs down. While durable, purists often prefer the Hamilton’s metal-heavy H-10.

Stainless Steel Bracelet

Hamilton Khaki Navy Scuba

The Hamilton Bracelet is fully brushed. This is great for hiding the “desk diving” scratches that happen when you rub your wrist against a laptop all day. It’s a pure oyster-style sport bracelet.

Tissot Seastar 1000

The Tissot Bracelet features polished center links. This makes the watch “sparkle” more in the light, giving it a dressier appearance. However, those polished links are magnets for fingerprints and small scratches.

Summary

Overall, the Hamilton Khaki Navy Scuba and the Tissot Seastar 1000 are very similar with a few small differences. They’re both 43 mm wide, however, the lugs have different designs, therefore the Tissot feels like a very round watch, as opposed the Hamilton’s overall look feels like the case is an integral part of the overall appearance.

The movements provide the same 80-hour power reserve, however the Hamilton doesn’t have a date window, and doesn’t have a see-through case back.

The bezel feels more elegant on the Hamilton, as Tissot’s bigger font size makes the bezel more prominent.

The oyster bracelet has the same butterfly clasp, however the design of the links is different as Hamilton has an all brushed stainless steel bracelet, while Tissot is using a brushed and polish finish combination.

Verdict: Hamilton Khaki Navy Scuba vs Tissot Seastar 1000

While your preference is the most important factor, our opinion can be summarized as follows:

Choose the Tissot if:

• Price is a factor, as the Tissot is slightly cheaper than the Hamilton.
• Have a larger wrist, as the Tissot’s design enhances the dial’s 43 mm case width. 
• Prefer a see-through caseback displaying the automatic movement.

Choose the Hamilton if:

• You have a smaller wrist, as the Hamilton has a more comprehensive design where the dial, case, and bracelet all contribute to the same look and feel.
• You’re looking for a watch that can be dressed up or down easily.

Feature	Hamilton Khaki Navy Scuba (43mm)	Tissot Seastar 1000 (43mm)
Movement	Hamilton H-10	Powermatic 80
Power Reserve	80 Hours	80 Hours
Water Resistance	300 m	300 m
Bezel	Ceramic (Matte / Fine Teeth)	Ceramic (Polished / Bold Teeth)
Case Back	Solid Steel (Engraved)	Exhibition (See-through)
Price	$995 - $1,225	$750 - $825
Best For	Tool-watch purists & Military Style	Modern Style (“Desk Dive”)