Corner-Notched Black Epsom Strap for a Bulgari Diagono
A corner-notched strap has its two outer corners cut back at the case end, so the strap drops into a lug recess that a square-ended band would never clear. That is the pattern this Bulgari Diagono CH 35 S was ordered with: black Epsom, measured A 22 mm / B 7 mm / C 4 mm, cut 80/130 mm, and tapered to a 15 mm buckle the owner already had.
Strap specifications
| Strap type | Custom corner-notched |
|---|---|
| Notch A | 22 mm (0.87 in) |
| Notch B | 7 mm (0.28 in) |
| Notch C | 4 mm (0.16 in) |
| Length | 80/130 mm (3.1 in / 5.1 in) |
| Leather | Black Epsom |
| Buckle end | 15 mm (0.59 in), owner’s own Bulgari buckle |
| Watch | Bulgari Diagono CH 35 S |
Why these choices
Corner notching is the Cartier Santos pattern, and it is cut entirely to the customer’s numbers rather than to a catalog of stock shapes. Three figures do the work here: A is the full width at the case end, B and C set how far the corners come back and how deep they are cut. Get any of the three wrong by a millimeter and the strap either rattles in the recess or refuses to seat. This is why a jeweler-taken measurement is worth the trip — they have the calipers and the watch is in their hands.
The taper from 22 mm at the case to 15 mm at the buckle is the second half of the fit. Fifteen millimeters is not a standard tang width, and it is not a number you pick for looks — it is what the owner’s existing Bulgari buckle measures. When a customer supplies their own buckle, the strap is built and shipped without one, sized to the tang they already own, and that is usually the right call on a watch whose original hardware is still in good condition.
Epsom is a stamped-grain calfskin, the same leather used for Hermès bags. It is light and scratch-resistant, and because the grain is pressed into the hide rather than raised off it, the leather holds a crisp edge where the notches are cut. That matters on a notched build more than on a plain one: the notch corners are exposed, and a soft, loose-grained hide rounds them off within a few weeks of wear. Black keeps the focus on the case.
★★★★★
“The watch came with an integrated titanium strap that did not work for me. I asked my jeweler to help with getting the replacement strap dimensions right. VGreen did a great job with a lovely custom notched leather strap…”
Ronald B. · Verified purchase · Custom corner-notched strap
Questions about this build
How do I measure a corner-notched strap for a Bulgari Diagono?
Three numbers: the full width where the strap meets the case (A), how far in from each edge the notch starts (B), and how deep it is cut (C). Take them with calipers on the watch itself, not from a spec sheet, since case tolerances vary between references. A jeweler can do all three in a few minutes.
Can I keep the buckle that came with the watch?
Yes. Choose the own-buckle option and give the width of your tang — 15 mm on this order. The strap arrives sized to that tang with no buckle fitted, so your original hardware carries straight over.
Notched work is made to order from your measurements, so allow 2–3 weeks to delivery. Send your figures through the custom corner-notched strap form, browse the rest of the notched strap range if your case needs a center notch instead, or see the other colors in Epsom.