Howdy Affordaphiles, I'd like to tap into the WUS hive mind for watches in the vein of Sinn's Modell 556i. Primarily, I like the 556i's case for its industrial minimalism (especially the execution of the crown guards) and it's size of 38.5mm. I am hoping for suggestions for classy sport watches no larger than 40mm, if possible.
Photo from Sinn's Website

Photo from Sinn's Website