The open-worked dial of the Oris TT1 Engine Date reveals the engine inside, the caliber Oris 733, which explains the model's name.
Movement Type
Automatic
Caliber
Oris 733Jewels
26
Reserve
38
Frequency
28800
Hands
Center Seconds
Shape
Round
Material
Stainless Steel
Glass
Sapphire
Diameter
42.00 mm
Water Resistance
100.00 m
Dial Color
Skeleton
Material
Rubber
