There is a particular weight to a well-made pair of sunglasses. Not heaviness, exactly, but a sense of intention, of material meeting craft in a way that has no shortcut. Most people feel it before they can name it. This guide will help you name it.
The Five Signs, in Short
- Acetate: hand-cut from Italian sheet, with colour running through the full thickness of the material.
- Hinge: riveted rather than glued, opening and closing with clean, even resistance.
- Lens: optically ground, free of edge distortion, with 100% UVA and UVB protection.
- Finish: level temples, bevelled lens edges, a bridge shaped by hand.
- Edition: a finite, numbered run rather than open-ended production.
The Material Comes First
The acetate used in luxury handmade frames is not the thin, brittle plastic of mass-market glasses. It is a cellulose-based material, produced in sheet form and then hand-cut, shaped, and polished over many hours. The finest comes from Mazzucchelli, a mill in Italy's Veneto district. The depth of colour is unmistakable: rather than a surface print, the pattern runs through the entire thickness of the material, so tortoiseshell reads as tortoiseshell from every angle, and remains so decades later.
You can feel the difference in your hands. Quality acetate has a smooth, almost silky texture and a slight warmth; it responds gently to body heat and does not feel inert. If a frame feels hollow, unconvincing in weight, or carries a plasticky sheen, it is likely injection-moulded rather than cut from sheet.
The Hinge Tells the Story
If the acetate is the skin of a frame, the hinge is its spine. In mass-produced eyewear, hinges are almost always glued or press-fitted into place. In handmade frames they are riveted, and in the finest examples, riveted by hand.
Look at the rivets. Berenford frames use hand-riveted German OBE hinges secured with signature brass rivets. Those rivets are structural, not decorative, and they age with grace, acquiring a warmth that deepens with wear. The hinge should open and close with even resistance: no give, no play. Run a fingernail across the rivet head. If it sits flush with the surrounding acetate, the work has been done properly.
For a closer look at how these principles read across our range, see the Icons collection.
The Lens Is Not Optional
A beautifully crafted frame is only as good as what you see through it. The difference between a precision lens and a cheap substitute shows immediately: distortion at the periphery, colour shift, inconsistent tint. These are not aesthetic concerns alone; poor optics cause eye strain and headache over time.
Quality handmade sunglasses carry lenses that meet optical standards independently of their tint. Berenford frames use hand-mounted Zeiss lenses, ground to exacting tolerances, with 100% UVA and UVB protection. The Zeiss name is not merely a heritage signifier. It reflects a measurable commitment to how light is controlled and corrected before it reaches your eye.
More on the craft and origins of the house on the Maison page.
Fit, Finish, and the Things Nobody Mentions
Quality eyewear is never symmetrical by accident. Both temples should lie flat at the same angle, and the frame should sit level on the face without adjustment. Held up to a light source, the acetate should be consistent in thickness across its profile, and the edges around the lens cutout should be smooth and slightly bevelled, not sharp.
Colour consistency is a quieter indicator. In hand-cut sheet acetate, no two frames from the same batch are precisely identical. This is not a flaw. It is the record of the material itself. Our Riviera frames show that variation at its most considered: subtle shifts in the grain that make each piece, in a genuine sense, yours alone.
The Numbered Edition
There is a final question to ask of any handmade piece: how many were made. True limited editions are not marketing language. They are a practical consequence of handcraft, since the hours required to produce each frame mean that production is, by definition, finite.
Berenford releases every model as a numbered edition of one hundred pieces, each individually numbered and never reproduced. When a model sells out, it is retired. This is not scarcity for its own sake. It is the honest arithmetic of making something properly, from a small house in Lugano, with free shipping wherever you are.
The current editions run across our Safari world and St. Moritz collection.
Questions We Are Often Asked
Is handmade eyewear more durable than mass-produced eyewear?
Usually, and the reason is repairability as much as strength. Riveted hinges and sheet acetate can be adjusted, re-tightened, and polished by a competent optician. Glued hinges set into moulded plastic often cannot.
How can I tell whether acetate is hand-cut?
Look at the pattern and the edges. Hand-cut sheet acetate carries colour through its full depth and shows small variations between pieces. Moulded frames tend to be perfectly uniform, with pattern that stops at the surface.
Does a numbered edition mean a frame is better made?
Not on its own. It does mean output is limited by hours of handwork rather than machine capacity, which is usually a good sign. Ask what the number refers to, and whether the model will ever be reproduced.
None of these signs shout. They accumulate quietly into an object that feels, in the hand and on the face, simply correct.