A Breakthrough in Watch Personalization
The Hampden Casecap® system (U.S. Patents 12,449,770 and D1072657) represents a new category of watchmaking innovation—combining mechanical precision with personal expression.
Exclusively featured on the Model 1 Sullivan, the Casecap® allows you to seamlessly switch between a sapphire exhibition display and a solid engraved back, using a secure, tool-free system engineered for durability and perfect alignment.
How the Casecap® System Works
The Casecap® is composed of three integrated components:
The Mounting Frame
A precision-machined frame that connects securely to the watch case.
Serves as the anchor point for both the exhibition and engraved elements.
Designed with a bayonet-style locking mechanism for quick interchangeability.
The Exhibition Disc
A removable sapphire crystal window offering a full view of the Swiss movement.
Locks into the mounting frame via the Casecap® coupling, creating a watertight seal.
Can be easily detached without tools.
The Engraved Casecap® Cover
A solid stainless-steel cap engraved through Hampden’s Design Concierge program.
Attaches in place of the exhibition disc, offering protection and personalization in one.
Acts as both a shield and a canvas—transforming your watch into a wearable keepsake.
Both the exhibition disc and the engraved Casecap® share the same gasket interface, maintaining pressure resistance and dust protection regardless of which is installed.
Two Configurations, One Watch
Exhibition Mode: Showcase your Swiss automatic movement through the sapphire display.
Engraved Mode: Replace it with your personalized Casecap® to celebrate a milestone, inscription, or message.
A simple quarter-turn locks each element into place with a reassuring click—precision engineering that feels as good as it looks.
Why the Casecap® Is Revolutionary
Traditional watches force a choice: exhibition or solid back.
The Casecap® system removes that compromise—uniting innovation, craftsmanship, and emotional storytelling in a single mechanism.
It’s more than a feature. It’s an embodiment of Hampden’s belief that a fine watch should connect the wearer to both craft and memory.
Included with Every Model 1 Sullivan
Each Model 1 includes:
1x Sapphire Exhibition Disc
1x Personalized Engraved Casecap® Cover
1x Precision Mounting Frame (factory installed)
A complete gasket system for water resistance
All components are assembled, inspected, and hand-finished in our Chicago workshop.
Learn More
Discover how to design your engraved Casecap® through our Design Concierge:
Or explore the innovation behind our flagship model: