
Condition
Like New
Box
Yes
Certificate
Yes
Diameter
39.5mm
Movement
Automatic
Certified Authentic
Every watch is backed by our authenticity guarantee.
Why Collectors Love This
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.
Specifications
The Set
Certificates Included
Box Type
European Watch Company Commitment

Authenticity Guaranteed
Certified by experts

Free Global Shipping
FedEx Priority Overnight

2-Day Returns
Easy returns policy

1-Year Warranty
Limited warranty
Shipping
Watches are delivered worldwide with complimentary FedEx Priority Express service and are insured for safe, secure, and fast arrival.
Global delivery: We ship worldwide with full insurance coverage and tracking.
Secure handling: Each watch is carefully and discreetly packed with protective materials, maintaining security and privacy.
Delivery timeline: Most domestic orders arrive the next day with FedEx Priority Express. International shipments typically take 2-4 business days, depending on Customs processing.
Trading
Thinking about trading in your watch? It’s easy! Reach out to our watch specialists to get a free shipping label and details on how we’ll handle your trade-in.
Free Shipping: We provide a prepaid FedEx Priority Express shipping label.
Secure Handling: Send your watch in its original box with protective packaging.
Fast Payment: Once we receive your watch, we will send payment by bank transfer or overnight check to your address, whichever you prefer.
For more detailed instructions, click here to view our full trade-in process.
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