Armin Strom Gravity Equal Force P03 "Night OPS" for Collective Horology - Special Edition "1 of 30" (Pre-Owned)Give green a go with the Armin Strom Gravity Equal Force P03, a 30 piece Special Edition for my friends at Collective Horology. Featuring a guilloch backplate executed by the workshop of Kari Voutilainen and a striking khaki green fum dial which vignettes from light green at its center to a dark greenish black at the periphery. The movement is Armin Strom's signature Gravity Equal Force calibre, the worlds first automatic winding watch with constant