Alicia Vikander wears an unidentified watch

Alicia Vikander reaches both arms through a rust-streaked porthole, a white oval gone orange at the edges, and the steel watch on her wrist catches the light. She plays Danielle Flinders in Submergence, a biomathematician who studies microbial life around deep-sea hydrothermal vents and thinks it may hold the secret to how life began. Wim Wenders directed it, from J.M. Ledgard's novel, as a love story split between the deep ocean and a desert cell: Danielle dropping toward the floor of the Greenland Sea in an experimental submersible, and James More, the British agent she meets at a hotel in Normandy, taken hostage and tortured in Somalia.

The watch is steel, on a steel bracelet, a flash of blue across the dial, the diver-adjacent look an oceanographer would strap on without a second thought. Past that the frame gives up nothing. No logo, no hand shape, no bezel marking survives the softness, and no reliable source has ever named it. Steel, a blue dial, and there the identification ends.

Submergence is a film about machines failing in the dark: far down in the Greenland Sea, Danielle's submersible loses all power and strands her in the black until a backup battery brings her up. All that engineering, defeated by the deep. And the smallest instrument she carries down, the watch, is the one nobody can even name. A watch is the easiest object in any film to put a name to. This one goes to the bottom of the ocean and comes back anonymous.