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Masunaga GMS-13 35

£ 356.00 GBP
Unit Price

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If you live in the UK, European Union or United States ( exceptions shown at checkout ) all VAT and Duties are prepaid by Pretavoir.

Free Travel Pack + Masks

Masunaga Case

*Cases may occasionally differ.

Model Number: GMS-13
Frame Colour: Shiny Dark Navy
Colour Code: 35
Frame Type: Full Rim
Frame Shape: Square
Material: Acetate
Lens Width: 47mm
Bridge Size: 21mm
Temple Length: 145mm
Our SKU: 155121

Size Guide

24 Month Warranty with All Frames Purchased.

More warranty details here..



This square Masunaga optical comes in a shiny dark navy frame.


Nestled in Fukui, Japan, Masunaga Optical emerges as a beacon of timeless elegance in the eyewear world. Fukui, renowned as one of the three major global production hubs for optical frames, stands proudly alongside China and Italy. In this enclave of craftsmanship, where 97% of Japanese-made optical frames find their genesis, Masunaga Optical has etched its legacy since 1905.

The tale began when visionary founder Gozaemon Masunaga planted the seeds of eyewear excellence in Fukui. With a grand vision, he summoned skilled craftsmen from Osaka and Tokyo, aiming to firmly establish Fukui as a powerhouse in the optical industry. The commitment to craftsmanship and quality became the cornerstone upon which Masunaga Optical built its reputation.

Masunaga glasses epitomize a fusion of tradition and innovation. Each pair is a testament to the artistry that has been honed over generations. The brand's roots in Fukui not only signify its commitment to quality but also celebrate the rich heritage of Japanese eyewear craftsmanship.

The frames crafted by Masunaga Optical are not just accessories; they are timeless pieces of art that transcend fleeting trends. From the traditional to the avant-garde, Masunaga eyewear caters to a spectrum of styles, ensuring that every individual finds a frame that mirrors their unique personality.

Masunaga sunglasses, a coveted extension of the brand's portfolio, exemplify a marriage of functionality and fashion. Whether shielding your eyes from the sun or making a bold style statement, each pair is a testament to the brand's dedication to precision and aesthetics.

The legacy of Masunaga Optical extends beyond mere eyewear; it is a narrative of passion, dedication, and a commitment to excellence. With roots deeply embedded in Fukui, the brand continues to shape the optical industry, setting the standard for Japanese-made eyewear.

As you explore Masunaga eyewear, you embark on a journey through time, where tradition meets innovation, and each pair tells a story of craftsmanship that transcends generations. Elevate your style, embrace the legacy – Masunaga, where vision meets artistry.

Prescription Lenses:

Our team are specialists at providing optical prescriptions. We offer a range of lens options to suit your vision, lifestyle and budget.
For more information on selecting your lenses please visit our information page here or you can contact us, our friendly team are always ready to help you find your perfect lens.

Your brand new Masunaga glasses will come including all official accessories and will be covered by our 24 month global warranty.

Authorised Masunaga Store.

More Masunaga Glasses

Enhance your clarity


Transparency that stands the test of life.


Absolute transparency

Reducing visible light reflections at 360° all around you for a vision relieved from light parasitics.

Durable resistance

Enduring scratch resistance against everyday handling such as wiping or dropping your eyeglasses.


Repelling water & dust, resisting to smudges for a lens that stays as clear as the first day you bought them¹

UV protection

Offering the most comprehensive daily protection against the invisible and often irreversible dangers of UV reflection.

Our latest innovation in anti-reflective coating

Every day, your eyes witness the frantic rhythm of your daily routine and make you discover what life is about. Daily aggressions can alter eyeglass wearers vision clarity and vision comfort.

Crizal® Sapphire™ HR, the best of Crizal coatings that provides transparency, durability and ease of care of the lenses.


How Crizal Sapphire HR withstands extreme testings

Crizal Sapphire HR real-life tests



Essilor has developed a thorough protocol to reinforce its testing methods, the Crizal Lifeproof multi-test. The performance of Crizal® Sapphire™ HR has been assessed under all conditions:

  • Anti-reflective efficiency: best-in-class transparency perceived by experts through a sensory analysis2.
  • Scratch resistance: superior scratch resistance vs previous generation after 12 months of wear in real-life3.
  • Easiness-to-clean: easy-to-clean after extensive smudging and 20,000 cleaning rubs4.
Crizal Sapphire HR clear lens packshot



Whether we are at home, at work or shopping, we are exposed to multiple sources of light. Coming from all angles, light reaches your lenses and creates reflections. These reflections can be a source of discomfort and impact your everyday life by making us adopt new behaviours, consciously and subconsciously. We adjust our heads, changing our posture or even remove our spectacle lenses just reduce the visual impacts of reflections. Crizal Sapphire HR reduces reflections regardless of where the light comes from. By reducing the amount of reflections your vision will be purer with more vivid images and improved lens aesthetics when others look at you. Transparency has never been so visible.(4)



It has been found that UV can have a cumulative effect on your eyes contributing to premature eye ageing and is associated as a risk factor of cataracts.(5) Crizal Sapphire HR filters UV rays preventing them from passing through the front of your lens and preventing them from reflecting off of the back of your lens into your eye. Thanks to this unique UV protection enhancement Crizal Sapphire HR has an E-SPF rating of 35, the highest E-SPF index on clear lenses for optimal UV protection.(6)



Crizal Sapphire HR ensures your spectacle lenses are resistant and repellent from scratches, smudges, water droplets and dust particles. Meaning - your lenses are incredibly protected, clear and easy to clean. Which comes in handy when facing everyday activities. 

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