Black and white. The cleanest reference in the collection — with a strap and case set that respects that. The Audemars Piguet × Swatch Royal Pop “Ocho Negro” is the Spanish-named black-and-white reference, the “every-occasion” piece in a collection of bright statement watches. It deserves to be on a wrist, not a lanyard. The Helvetus strap and case set is how you get it there.

The strap and case system the Royal Pop was missing

The Audemars Piguet × Swatch Royal Pop was designed as a Bioceramic pocket watch — carried on a calfskin lanyard or clipped to a bag. Swatch did not include a wrist strap. We did. The Helvetus Royal Pop strap and case set converts the pocket watch into a fully wearable wristwatch in seconds: pop your Royal Pop out of its original chassis, click it into our precision-fit case, attach the strap, and you are wearing the Royal Oak silhouette on your wrist for the first time.

Built by the Royal Oak strap specialists

Helvetus has been engineering aftermarket straps for the Audemars Piguet Royal Oak family for years — Royal Oak 39, Royal Oak 41, Offshore 42, Offshore 44, and the Offshore Diver. No other strap brand offers a deeper Royal Oak compatible range. The Royal Pop strap and case set is a direct extension of that work, engineered around the exact 40 mm octagonal Bioceramic case head (8.4 mm thick) so the strap sits flush against the case, the case sits flush against the watch, and the exhibition caseback — the decorated hand-wound SISTEM51 movement — stays fully on show.

Made for Ocho Negro

Our case is color-matched to the Ocho Negro (Ref. SSX03W101N), with a clean finish that respects the high-contrast black-and-white palette. The FKM rubber strap is offered in matched black, off-white, and grey — the most versatile Royal Pop reference deserves a strap selection that doesn’t compromise its everyday wearability. As a Lépine reference, the crown at 12 o’clock is rotated to a natural wrist position by the case geometry.

The strap — premium FKM rubber, stainless steel buckle

The Helvetus Royal Pop strap is cut from premium FKM rubber — the same compound we use across our Rolex, Audemars Piguet, and Patek Philippe strap range. FKM is the gold standard for luxury watch straps: it does not discolor, does not crack, repels water and sweat, and stays comfortable from the first wear. The strap terminates in a brushed stainless steel buckle, available in your choice of finish, and is engineered so the lug-end geometry mates cleanly with the Royal Pop case — no gap between strap and case, no awkward break in the line, no compromise on the Royal Oak silhouette.

Non-destructive, fully reversible

No drilling, no modification, no permanent change to the watch. The case clicks around the original Bioceramic case head and the strap clips into the case — both can be removed in seconds, returning your Royal Pop to its original pocket-watch configuration whenever you want.

Build the Royal Pop you actually want to wear

• Strap color — premium FKM rubber in multiple colors, matched or contrasted to the Ocho Negro palette- Case color — multiple colorways available for the Ocho Negro reference- Buckle color — choose your stainless steel finish- Fully interchangeable — swap straps, swap cases, swap buckles. The Helvetus Royal Pop strap and case system is modular by design, so you can run a new look any day of the week.

The Helvetus standard

• Premium materials, Swiss engineering- Lifetime warranty on all rubber straps; 1-year warranty on the case and all other materials- Free worldwide shipping- No import costs — what you see is what you pay, anywhere in the world- 14-day returns

Compatibility

Audemars Piguet × Swatch Royal Pop “Ocho Negro” (Ref. SSX03W101N). Lépine style, crown at 12 o'clock. The strap and case set is engineered specifically for this configuration.

Helvetus is not affiliated with, endorsed by, or sponsored by Audemars Piguet or Swatch AG. The Audemars Piguet × Swatch Royal Pop watch is not included. All trademarks referenced are used for descriptive and compatibility purposes only.