
Wristwatches · Wristwatch
Vintage BALZER Diver (JENNY Sealab 913) ETA 2452, circa 1968
- Maker / attribution
- Unrecorded in source
- Date
- c. 1968
- Historical period
- Modern Mechanical Horology (1945 – 1969)
- Country of origin
- Unrecorded in source
- Object type
- Wristwatch
- Dimensions
- Case 42 mm
- Stock no.
- vws2488cs
- Credit line
- Dealer listing, Vintage Watch Specialist (vws2488cs)
- Catalogue title (original)
- Rare Vintage BALZER Diver (JENNY Sealab 913) ETA 2452 - c.1968 (English)
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Record summary
Catalogued by Vintage Watch Specialist (dealer), United Kingdom (stock number vws2488cs), this is a wristwatch, dated c. 1968. The Atlas places it in the Modern Mechanical Horology period (1945 – 1969) of its Wristwatches collection. Recorded dimensions: Case 42 mm. The record is illustrated with 6 photographs.
Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.
Catalogue description
Dealer description — Vintage Watch Specialist
A Superb Vintage Balzer Dive Watch (JENNY Sealab 913) in Fantastic Condition Paired with an NSA Steel Bracelet. c.1968 The dive watch category has inspired many “micro-brands” and “boutique brands” over the last few decades many of which are effectively watches manufactured by an outside supplier and simply equipped with the brand’s own logo - in this case, the Balzer is a rebranded Jenny Sealab 913 - a producer of Dive watches in the 1960s. Founded in 1963, Jenny's primary focus was producing professional-grade dive watches, and at that, they excelled. During the mid-1960s, Jenny patented their MONOBLOC Triple-Safe case designs, which were used on their own self-branded pieces, as well as contracted by brands like Fortis. What’s On Offer A superb and rare vintage diver from Balzer, which is in fact a watch produced by Swiss brand JENNY, which is a sister brand to the famous DOXA brand and the first watchmaker to produce a 1,000-metre water-resistant dive watch - so the Balzer has a great pedigree! This watch has a real presence on the wrist, at 42mm it is fairly meaty and the striking throwback to the sixties styling really accentuates that. It is in fantastic condition with a royal blue dial and outer white chapter ring punctuated with zingy yellow hour plots with original lume for visibility. The blue bi-directional bezel is in great shape too. The watch has been paired with an NSA bracelet - a Swiss company and the original manufacturer of bracelets for many major watch brands including Rolex. Additional information Made from Case: Stainless Steel Dial: Blue Crystal: Plexiglas Bracelet: NSA Steel Bracelet with Fold Clasp Technical specifications Winding: Automatic Movement Type: Mechanical Calibre: ETA 2452 Jewels: 21 Waterproof: When new (20ATM) Power reserve: 42hrs Purchase details Condition: Excellent Model Reference: Unknown Date of issue: c.1968 Dimensions Width (without crown): 42mm Lug width: 20mm Lug height: (lug to lug) 45mm Wrist size: 195mm (can be adjusted)
Historical context
Modern Mechanical Horology (1945 – 1969)
Tool watches for divers, pilots and astronauts; electric watches anticipate the electronic age.
The classic era of the mechanical wristwatch: dive watches, chronographs for motor racing and space flight, GMT watches for jet travel, slim dress watches, automatic calendars, and the rise of Japanese manufacturers alongside Swiss, American, German and Soviet industries.
Read the period in the timelineMore wristwatches from this periodEarlier: Golden Age of Mechanical Watchmaking
Atlas type guide
Dive and water-resistant watches
Keeping water and dust out of a wristwatch was a long-standing challenge. Rolex's screw-down Oyster case (1926) and Omega's Marine (1932) were landmarks; in the early 1950s Blancpain's Fifty Fathoms and Rolex's Submariner defined the professional dive watch with rotating bezels for timing dives, luminous dials and high water resistance. The ISO 6425 standard (1982) later codified what a 'diver's watch' must do.
Dive watches became icons of post-war design and exploration, and their evolution — helium escape valves, ceramic bezels, saturation-diving depth ratings — records the history of underwater work.
What to look for
- Unidirectional or bidirectional rotating bezel with minute markings.
- Screw-down crown and case back; depth rating printed on the dial.
- Luminous hands and markers (radium before c. 1960, tritium c. 1960–1998, then Super-LumiNova).
- Reference numbers on the case between the lugs or inside the back.
Dating clues
- Screw-down Oyster cases: from 1926.
- Professional dive watches: from 1953.
- Tritium 'T' marks on dials: c. 1960–1998.
General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.
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