Gronefeld 1941 Principia SS Blue Dial

The Gronefeld 1941 Principia in stainless steel with blue dial embodies the Horological Brothers’ first automatic wristwatch, introduced circa 2018. Housed in the sculpted 1941 case measuring 39.5 mm in diameter and a slender 10.5 mm thickness, its solid sterling silver dial is finished in a striking blue tone, offering superb legibility and refined presence. Powered by the in‑house automatic caliber (G‑06) featuring a 22‑karat solid gold unidirectional rotor on a ceramic ball bearing, the movement delivers 56 hours of power reserve and exhibits exceptional finishing, including stainless steel bridges, gold chatons, and a free‑sprung balance. The watch’s design references both the heritage of Sir Isaac Newton’s “Principia” and the brothers’ Dutch roots, with architectural bridge motifs and flame‑blued lancette hands. Water resistant to 30 meters, this timepiece is not limited in production but remains rare due to the labor‑intensive hand finishing. It represents a compelling entry‑level proposition in the Gronefeld catalog that retains the brand’s signature craftsmanship and mechanical excellence. Like New with Gronefeld box and papers. This 1941 Principia was just fully serviced By the Factory in Q2/2026.