Armin Strom Gravity Date Earth ST14-DE.90

It runs on the automatic calibre ADD14, wound by a micro-rotor, with a five-day power reserve. A 24-hour display on the same axis as the date shows whether it is day or night, which makes the date easier to set.

The other elements share the 43.4 mm case and skeleton dial and differ in metal: Air (TI14-DA.50) is titanium, Water (ST14-DW.50) is uncoated stainless steel and Fire (RG14-DF.90) is rose gold. The Gravity Earth (ST13-GE.90) has the same black-coated steel case on the AMR13 calibre, without the date, and the Tourbillon Gravity Earth (ST14-TE.M.90) uses the ATM13 tourbillon calibre in a run of 50. DE in the reference marks the Date Earth, GE the Gravity Earth.