Inside the case and certainly not visible through the SD-1's closed and entirely sterile
link caseback the watch uses a straightforward and reliable Sellita SW200 automatic movement. More interesting than the movement which is all well and good at this price point is the lack of text on the case back. Dietrich has actually moved
link all of the minimal
link engravings to the flat segment between the lugs leaving the entire caseback unadorned and presumably ready for a customized engraving.