Case Backs: Screw-In vs Screw Down
There are many methods for sealing down a case back, and the primary method for Stuhrling watches is Screw-In and Screw Down. Both serve the same general function, but there are subtle differences. The Screw-In case back is the most common type for Stuhrling, and it is recognizable by the notches along the outer edge.
Case Back
The entire case back is screw into place using a specialized tool that catches each of these notches. Despite its seemingly simple design, it is a very effective means of achieving up to 5ATM water resistance.
The Screw Down case back, like the name suggests, is fastened to the case using at least 4 separate screws. This method provides up to 10ATMs water resistance.
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