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The modern Longines Ultra-Chron Diver brings back the high-beat idea in a 43 mm dive-watch design: reference L2.836.4.52.6 runs at 36,000 vibrations per hour, has a silicon balance-spring and offers up to 52 hours of power reserve. Longines ties the watch to its 1968 Ultra-Chron Diver; its separate 40 mm Ultra-Chron Classic keeps the high-beat movement but adds a date and is rated to 5 bar rather than the Diver’s 30 bar.
What makes the Ultra-Chron a high-beat watch?
Longines specifies a frequency of 36,000 vibrations per hour for the automatic movement in the Ultra-Chron Diver. That is the central high-beat feature: the movement is designed to oscillate at a faster rate than many conventional mechanical movements. Longines also lists a monocrystalline silicon balance-spring and a power reserve of up to 52 hours for this reference. These are manufacturer specifications, not independent measurements of accuracy or performance. Longines’ US product page for L2.836.4.52.6
| # | Preview | Product | Price | |
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| 1 |
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LONGINES Legend Diver Automatic Watch | $3,550.00 | Buy on Amazon |
| 2 |
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LONGINES Legend Diver 39MM Automatic Watch | $3,850.00 | Buy on Amazon |
| 3 |
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LONGINES Legend Diver 39MM Automatic Watch | $3,850.00 | Buy on Amazon |
| 4 |
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LONGINES Legend Diver Automatic Watch | $2,850.00 | Buy on Amazon |
| 5 |
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HYDROCONQUEST 41MM Automatic Watch | $1,600.00 | Buy on Amazon |
Longines’ launch announcement, dated 31 May 2022, described the new watch as “more accurate than a chronometer” and noted that it ticks at 10 beats a second. The release does not establish the test conditions or scope behind that accuracy comparison, so it should be read as Longines’ launch claim rather than a universal or independently verified performance result. Longines’ 2022 announcement
What is the modern Ultra-Chron Diver?
The specific watch is reference L2.836.4.52.6: a 43 mm stainless-steel model with a black dial and steel bracelet. Longines lists a sapphire crystal with anti-reflective coating, a screw-in crown and a unidirectional rotating bezel. The product listing specifies 30 bar water resistance and does not list a date display. Longines product specifications
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- Automatic L888 Movement, Hours, minutes, seconds, and date. Screw-down case back
- Brown Leather strap with buckle
- 5 Year International Warranty
The 30 bar figure is Longines’ stated water-resistance specification. It does not, by itself, establish independent dive certification or a particular practical diving standard; the cited product information does not document such certification or testing.
How does the Diver differ from the Ultra-Chron Classic?
The Ultra-Chron Classic is a separate model, not simply the Diver in a smaller case. The cited Classic reference is L2.937.4.72.6, with a 40 mm case, silver dial, steel bracelet and date. Longines lists the same 36,000-vibrations-per-hour automatic movement specification, silicon balance-spring and up to 52 hours of power reserve, but rates the Classic to 5 bar. Longines’ listed specifications do not position this Classic reference as a dive watch. Longines’ US product page for L2.937.4.72.6
Rank #2
- Automatic L888 movement. hours, minutes, seconds. Screw-down case back
- Stainless steel with double security folding clasp with micro adjustment system
- 5 Year International Warranty
| Specification | Ultra-Chron Diver L2.836.4.52.6 | Ultra-Chron Classic L2.937.4.72.6 |
|---|---|---|
| Case size | 43 mm | 40 mm |
| Movement and reserve | Automatic; 36,000 vibrations per hour; silicon balance-spring; up to 52 hours | Automatic; 36,000 vibrations per hour; silicon balance-spring; up to 52 hours |
| Water resistance listed by Longines | 30 bar | 5 bar |
| Dial and date | Black dial; no date listed | Silver dial; date |
| Other listed features | Steel bracelet, screw-in crown, unidirectional rotating bezel, sapphire crystal with anti-reflective coating | Steel bracelet, sapphire crystal with anti-reflective coating |
| Displayed US price | $4,200 | $4,000 |
The displayed prices are those shown on Longines’ US product pages when the cited information was retrieved; they are not a market survey or a guarantee of current price or availability. Check the relevant regional listing for current details.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is the connection to the 1968 Ultra-Chron?
Longines says it launched the Ultra-Chron Diver in 1968 and describes that model as the first dive watch equipped with a high-frequency movement. That “first” is the manufacturer’s historical claim. Longines places the Diver within a longer high-frequency history, saying it developed its first high-frequency wristwatch movement—an observatory chronometer—in 1959. The modern watch’s launch announcement followed on 31 May 2022. Longines’ historical and launch account
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Best Value
- Automatic L888 movement, hours, minutes, seconds and date Screw-down case back
- Stainless steel with double safety folding clasp
- 5 Year International Warranty
Rank #4
- Automatic L888 Movement, Hours, minutes, seconds, and date. Screw-down case back
- Blue Leather strap with buckle
- 5 Year International Warranty
Rank #3
- Automatic L movement, hours, minutes, seconds. Screw-down case back
- Stainless steel with double security folding clasp with micro adjustment system
- 5 Year International Warranty
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
