# Nubeo Curiosity Evolution Open Heart LE-100 Review by A.I. WatchMetrics

## Watch Summary
The Nubeo Curiosity Evolution Open Heart LE-100 is a contemporary sports-diver hybrid from Spanish microbrand Nubeo, boasting a compact 40mm stainless steel case with sunburst dial featuring a captivating open-heart window at 12 o'clock revealing the Miyota 90S5 automatic movement's beat, 200m water resistance for adventure-ready performance, and limited to just 100 pieces for collectors seeking unique value under $1,000, ideal for the enthusiast who appreciates refined tool watch aesthetics without luxury markups.

## Overall Watch Rating: 6.4/10.0

**Material Metric (9.5/10.0)** - Exceptional use of 316L stainless steel with double-domed AR-coated sapphire front and back rivals higher-end divers like the Oris Aquis at a fraction of the cost.
**Rarity Metric (5.5/10.0)** - The 100-piece limited edition boosts scarcity comparable to many microbrand runs, though secondary market availability tempers ultimate exclusivity versus one-off haute pieces.
**Versatility Metric (7.5/10.0)** - Balances robust 200m dive specs with open-heart elegance for sports, casual, and light adventure use much like a Seiko Prospex with added flair.
**Dials & Design Metric (7.5/10.0)** - Sunburst dial, applied indices, and BGW9 lume deliver refined tool-watch appeal on par with Sinn entry models, elevated by the unique open-heart integration.
**Movement Metric (6.8/10.0)** - The reliable Miyota 90S5 open-heart automatic offers solid performance akin to modified NH35s in microbrands, punching above basic quartz but below Swiss workhorses.
**Brand Metric (6.0/10.0)** - Nubeo as a young Spanish microbrand scores well for enthusiast focus and quality control, similar to Belerophon or Baltic in the high-premium segment.
**Functions Metric (5.0/10.0)** - Standard hours, minutes, and central seconds provide everyday reliability matching mid-tier automatics like Hamilton Khakis, without extra indications.
**Complications Metric (3.9/10.0)** - The open-heart display adds visual intrigue equivalent to a basic small seconds, but lacks functional complexity found in even entry chronographs.
**History & Innovation Metric (3.5/10.0)** - Limited heritage as a new microbrand with niche open-heart diver innovation trails established names like Citizen but shows promise in affordable execution.

## Total Performance Score (TPS): 4.9

## WM Collector Grade: C+

## Performance Insights: Excels in materials and rarity for premium feel, tempered by nascent brand history and basic functions, delivering strong value well below its $1,100 implied price at $900 MSRP.
## TPS Interpretation: Good Value: The watch overdelivers on build quality and exclusivity relative to price, making it a smart pick for microbrand collectors.

## Watch Data
[https://nubeowatches.com/wp-content/uploads/2024/05/curiosity-evolution-open-heart-1-scaled.jpg] - [https://nubeowatches.com/wp-content/uploads/2024/05/curiosity-evolution-open-heart-back-scaled.jpg]; [https://nubeowatches.com/wp-content/uploads/2024/05/curiosity-evolution-open-heart-lume.jpg] - [Nubeo Curiosity Evolution Open Heart LE-100]; [Nubeo] - [Curiosity Evolution Open Heart LE-100]; [Spain] - [https://nubeowatches.com/producto/curiosity-evolution-open-heart-limited-edition/]; [] - [Limited edition automatic open-heart sports watch with 200m water resistance, sapphire crystals front and back, powered by Miyota 90S5, edition of 100 numbered pieces.]; [40] - [47.5]; [11.8] - [22]; [200] - [42]; [28800] - [BGW9 on hands and indices]; [24] - [316L Stainless Steel satin finished]; [Sapphire double-domed with interior anti-reflective coating] - [Fixed]; [Sapphire display] - [Screw-down]; [Italian calf leather quick-release] - [Round]; [Sunburst blue with open heart at 12 o'clock, applied indices] - [Yes]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [Yes] - [Yes]; [Yes] - [No]; [No] - [Yes]; [Yes] - [No]; [No] - [No]; [No] - [No]; [No] - [No]; [No] - [4.9]; [C+]; [1100];
**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**