Introduction
The Junghans Milano Mega Solar (ref. 56/4628.44) is a masterclass in understated design and modern horological pragmatism. At first glance, it appears as a pure Bauhaus timepiece—clean lines, uncluttered dial, and a case that whispers rather than shouts. But beneath that serene exterior lies a solar-powered quartz movement that eliminates the need for battery changes, marrying sustainability with the brand’s century-old commitment to precision. For the sophisticated young collector who values both aesthetics and environmental consciousness, this watch offers a compelling proposition: a daily companion that never needs winding, never runs out of power, and never compromises on style.
The Milano Mega Solar is part of Junghans’ broader effort to modernize its iconic design language without losing the soul of the original 1960s models. The reference 56/4628.44 features a 40mm titanium case, a deep black dial with applied indices, and a date window at 3 o’clock. It is a watch that feels both retro and futuristic—a bridge between the analog past and the solar-powered future. In this review, we’ll dissect every aspect of this timepiece, from its movement architecture to its real-world wearability, to help you decide if it deserves a place in your collection.
Manufacture History
Junghans was founded in 1861 in Schramberg, Germany, and quickly became one of the country’s largest watch manufacturers. The brand is best known for its collaboration with Bauhaus designer Max Bill in the 1960s, producing watches that epitomize the “form follows function” philosophy. Today, Junghans continues to produce affordable, high-quality timepieces that blend minimalist aesthetics with reliable movements, including solar-powered quartz calibers developed in-house.
Movement
At the heart of the Milano Mega Solar is the Junghans caliber J645.85, a solar-powered quartz movement. The solar cell is integrated beneath the dial, charging a rechargeable lithium-ion battery. The movement is rated to ±10 seconds per year, which is exceptional for any quartz watch. It also features a soft iron shield to protect against magnetic fields, a thoughtful touch for a watch meant to be worn daily. While quartz movements lack the mechanical romance of automatic calibers, the J645.85 is a marvel of efficiency and reliability.
Specifications
- Case diameter: 40mm
- Case thickness: 10.5mm
- Lug-to-lug: 46mm
- Case material: Titanium
- Crystal: Sapphire with anti-reflective coating
- Water resistance: 100m
- Lume: None
- Strap: Black leather with pin buckle
Wrist Feel
The titanium case makes the Milano Mega Solar incredibly light—just 55 grams on the leather strap. It sits flat on the wrist thanks to the 46mm lug-to-lug and 10.5mm thickness, sliding easily under a dress shirt cuff. The 40mm diameter is a sweet spot for most wrists, offering a modern yet not oversized presence. The leather strap is supple from day one, with a quick-release system for easy swapping. The overall balance is excellent; you forget you’re wearing it, which is the highest compliment for a daily watch.
The brushed titanium case resists scratches well and has a warm, matte grey tone that pairs beautifully with the black dial. The sapphire crystal is slightly domed, adding a subtle vintage touch. The crown is signed with the Junghans logo and operates smoothly. For those who prefer a metal bracelet, the Milano Mega Solar is also available on a titanium mesh bracelet, but the leather option keeps the weight down and the look classic.
Accuracy
As a solar quartz, the Junghans Milano Mega Solar is exceptionally accurate. The J645.85 caliber is rated to ±10 seconds per year, which in real-world use translates to about ±1 second per month. I’ve worn it for three weeks and observed a total deviation of less than 2 seconds. The solar charging is efficient: a full day in indirect sunlight provides enough energy for several months. Even after a week in a drawer, the watch continued running without issue. For those who value set-and-forget precision, this is as good as it gets.
Occasions
The Milano Mega Solar is versatile enough for daily wear, dress occasions, formal events, and travel. Its 100m water resistance means you can swim with it, though the leather strap is not ideal for water. The clean dial works equally well with a suit or a t-shirt.
Wrist Presence
3/5 – The Milano Mega Solar is deliberately understated. It doesn’t shout for attention; instead, it rewards close inspection with its crisp dial printing, polished hands, and the subtle interplay of light on the titanium case. On the wrist, it reads as a classic dress watch with a modern twist. It will not turn heads in a room, but those who notice will appreciate its quiet sophistication.
Reference Variants
The Milano Mega Solar is available in several dial colors and strap options. The reference 56/4628.44 is the black dial on leather. Other variants include silver dial (56/4628.45), blue dial (56/4628.46), and black dial on titanium mesh bracelet (56/4628.47).
Family References
The Milano Mega Solar belongs to the Junghans Mega Solar family, which also includes the Max Bill Mega Solar, Form Mega Solar, and Meister Mega Solar models. All share the same solar quartz movement and Bauhaus-inspired design language.
Other Notable Models by Junghans
Junghans offers a wide range of watches, from the iconic Max Bill Handaufzug (manual wind) to the Meister Chronoscope (automatic chronograph) and the Form A (quartz dress watch). The brand is also known for its radio-controlled solar watches.
Similar Watches
If you like the Milano Mega Solar, consider the Citizen Eco-Drive BM8180-03E (field watch style, solar), the Seiko Solar SNE545P1 (dress watch, solar), or the Mondaine Mega Solar (Swiss railway design, solar).
Homages
For a budget-friendly alternative, the Sternglas Naos Solar offers a similar Bauhaus solar quartz watch with a titanium case for around $350. The Braun BN0151 is another minimalist solar quartz option at $200, though with a plastic case.
Investment Value
The MSRP is $850, and pre-owned examples sell for $550–$700. The trend is stable; this is not an appreciating asset. Buy it to wear and enjoy, not to flip. The solar movement and titanium case ensure longevity, but resale values remain flat. No major auction history.
Service Interval
Junghans recommends a service every 5 years, but the solar battery is designed to last 10+ years. Battery replacement costs around $50 and can be done by any watchmaker. Authorized service is not required.
Pros and Cons
Pros: Solar-powered, no battery changes; lightweight titanium case; Bauhaus design with superb legibility; sapphire crystal with anti-reflective coating; 100m water resistance.
Cons: No lume on dial or hands; leather strap may wear quickly; quartz movement lacks horological romance; limited color options.
Final Verdict
The Junghans Milano Mega Solar is a triumph of practical design. It delivers the precision of quartz with the sustainability of solar power, all wrapped in a titanium case that is both light and durable. For the collector who values aesthetics, accuracy, and environmental responsibility, this watch is a no-brainer. It may not excite the mechanical purist, but for everyday wear, it is nearly perfect.
