(Bloomberg) -- After queuing for days to get their hands on the new Audemars Piguet-Swatch collaboration, fans on Saturday finally got their chance to buy the eye-catching pop-art timepiece, but heaving crowds stopped some stores from opening their doors and prompted pleas for calm.

Watch fans spent a week falling in love with colorful Royal Oak wristwatches that didn’t exist—then the real thing arrived. Now, fantasy is becoming a manufacturing opportunity.

Swatch and Audemars Piguet reveal the Royal Pop, a collection of eight pocket watches that are already leaving watch amateurs, collectors and experts very divided.