A practical guide to the DD3285 caliber, including its independently adjustable hour hand, GMT operation, power reserve, and the checks that matter.
What is the DD3285?
The DD3285 is an automatic GMT movement built around the functional layout collectors expect from modern travel-watch references. Its defining feature is an independently adjustable local-hour hand paired with a 24-hour GMT hand.
Key functions to evaluate
Independent local hour
The local-hour hand should advance cleanly in one-hour steps without disrupting the minutes or seconds.
Power reserve and winding
Evaluate reserve consistently after a full wind, and confirm that manual winding and automatic winding both feel smooth.
Which watches use it?
Browse our GMT Master II collection for current references and technical specifications.
Specifications are checked against current factory documentation and hands-on product information. This guide is reviewed whenever a new batch or movement revision is released.