Sidereus Ltd

Sidereus Limited is an Irish-based watchmaker that blends contemporary design with a deep respect for heritage. Through its online store the company offers a curated range of limited-edition timepieces, each individually numbered and produced in strictly controlled series of 50 pieces (or fewer for special editions). The collections include the Prêt-à-Porter line - featuring Newgrange, Dowth, Knowth and other historically inspired models - as well as the ultra-exclusive Reserve and Gordon Bennett special editions, which showcase bespoke dial colours, precious-metal inlays and personalised engraving.

Beyond the classic date-time watches, Sidereus has launched the Sidus Collection, its first GMT-capable range. These models employ an innovative under-dial disc to display a second time-zone, with a dual-tone background that shifts from night to day, and a bi-metallic dial that catches the light across concentric conical surfaces. The brand also provides flexible payment cards and a selection of straps, and invites enthusiasts to join its Collectors Circle for updates on new releases and events. All watches are crafted, tested and dispatched from Ireland to customers across the island, the UK and the EU.