What is the Casecap system?

The Hampden Casecap® system (U.S. Patents 12,449,770 and D1072657) combines mechanical precision with personal expression. It appears on the Sullivan in both 37mm and 42mm.

The Casecap lets you switch between a sapphire exhibition display and a solid engraved back, using a secure, tool-free system engineered for durability and alignment.

How the Casecap system works

The Casecap is composed of three integrated components.

1. The mounting frame

   
   

2. • 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.
2. The exhibition disc

   
   

3. • 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 detached without tools.
3. The engraved Casecap cover

   
   

4. • 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, turning 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.

Casecap system video

Two configurations, one watch

• Exhibition mode: show your Swiss automatic movement through the sapphire display.
• Engraved mode: replace it with your personalized Casecap to mark a milestone, inscription, or message.

A simple quarter-turn locks each element into place with a reassuring click.

Why the Casecap matters

Traditional watches force a choice between an exhibition back and a solid one.

The Casecap system removes that compromise, uniting innovation, craftsmanship, and personal storytelling in a single mechanism. It reflects Hampden's belief that a fine watch should connect the wearer to both craft and memory.

Included with every Sullivan

Each Sullivan 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

To design your engraved Casecap through the Design Concierge, see how to personalize your Hampden watch.

You can also read more about the Sullivan and the Casecap system on our site.

Updated on: 21/08/2026