Introducing the Marylebone Grand Date Calendar Open Heart Automatic
The City of London Marylebone Grand Date Calendar Open Heart Automatic marks the return of one of Thomas Earnshaw’s most celebrated signatures — refined, balanced, quietly sophisticated, and unmistakably inspired by the heritage of London’s iconic boroughs.
For a limited time, enjoy 20% off with code COL20
Time, Elevated.
Meet the Marylebone Grand Date Calendar Open Heart Automatic — the modern face of classic watchmaking.
Designed for the Everyday and the Exceptional
The 42mm case is shaped for perfect daily balance, while the open-heart dial offers a glimpse into the movement that drives every moment. With its grand date display and a clear exhibitioncaseback, the watch brings function and character together in a way that feels both easy and elevated—your dependable companion for anything the day brings.
Twelve Ways to Wear Your Story
Whether you choose leather or a bracelet, something bright or something quiet, the collection is built to match individual style with effortless confidence. Each variant has its own tone and presence, allowing you to find the one that reflects your story and the way you choose to wear it.
Exceptional Specification
Case material
Stainless Steel
Case thickness
14mm
Band
22mm Genuine Leather Strap / Stainless Steel Bracelet With Deployment Buckle With Push Buttons
Movement
Automatic With Multi-function
Case diameter
42.0mm
LENS
Anti Reflection Coated Mineral Lens
Case material
Stainless Steel
Case thickness
14mm
Band
22mm Genuine Leather Strap / Stainless Steel Bracelet With Deployment Buckle With Push Buttons
Movement
Automatic With Multi-function
Case diameter
42.0mm
LENS
Anti Reflection Coated Mineral Lens