At a glance
- Subject type
- independent watchmaking practice
- Historical origin
- Sydney / Manly, Australia (2007–2011 accounts)
- Important date layers
- Not established in this research pass
The curve is the complication
Ari’s shape forced a change in the mechanical layout. Turning the wheels of a flat movement out of their original plane creates clearance problems; Leube therefore rebuilt the architecture around an arc and adapted the Record-derived train and escapement. Curved plates and bridges also changed how the parts could be held and machined. Her account names custom holders and local toolmaker Jens Frei’s assistance, alongside specialised sapphire and strap suppliers. The result is an unusually concrete example of design changing both the mechanism and the manufacturing process, rather than an exterior styling exercise. 12
Prescher’s workshop as a bridge from restoration to original manufacture
Leube describes restoration as an important foundation, then identifies a different step in 2005: building Prescher’s double-retrograde and multi-axis mechanisms. That testimony connects a particular kind of workshop learning to her later independent practice without making her the inventor of Prescher’s complications. By the end of 2007 she had started her own business, and the Ari was publicly documented in 2011. The chronology is useful because employment, independent establishment and first presentation are different milestones, each with its own evidence. 23
Key dates
Ownership and continuity
Independent business start reported in 2007; later operating and relocation history remains unresolved. 2
Watchmakers and designers linked to Eva Leube
These people have a sourced relationship to this brand in the Enjoy Watches register. The label beside each name states the relationship recorded; it should not be read as a broader employment or ownership claim.
- Eva Leube — Own watchmaking practice
Identification and service
For an individual watch, record the complete reference, serial, dial, case, and movement markings and compare them with dated primary documentation.
A brand history cannot authenticate, appraise, or establish the provenance of a particular watch.
Evidence and limits
How the claims are supported
- source stated claim
Ari uses a curved movement based on heavily modified Record 302 components; the maker describes intermediate pinions, a reversed escape wheel and altered pallet fork to display the mechanism from above.
- source stated claim
Leube says curved parts had to be milled from blocks and required custom holders; she chose curvature after trying different diameters on several wrists.
- source stated claim
Leube credits herself with Ari’s drawings, movement, case, crown and buckle; she names Swiss sapphire manufacture, German straps, engraving by John W. Thompson, and tooling assistance from Jens Frei.
- source stated claim
Leube says she began independent-watch manufacturing work with Thomas Prescher in 2005, building double-retrograde mechanisms and multi-axis flying tourbillons.
- source stated claim
In her July 2011 interview, Leube dates starting her own business in Sydney to the end of 2007.
- verified fact
The June 2011 workshop visit documents the Ari after its Baselworld presentation, including the visitor trying it on.
Known limits
- Sources provide detailed 2011 testimony and product specifications but no reliable dated 2026 operating evidence. Length differs by 1 mm between maker and visit.
Direct sources
- The Ari WatchEva Leube · first party · accessed September 15, 2026
Locator: Movement explanation and specification. First-party source; its statements remain attributed.
- An interview with Eva LeubeThe Sydney Tarts · original interview · accessed September 15, 2026
Locator: What sort of movement; curvature challenges; Curvature challenges and wrist-fit answers; How much of Ari is made by you; curvature challenges; Answer: influence of Thomas Prescher; Opening answer; answer about naming Ari. First-party source; its statements remain attributed.
- Eva Leube: An IntroductionThe Sydney Tarts · original workshop visit · accessed September 15, 2026
Locator: Opening visit narrative and fitting paragraphs. External source.
Corrections
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