The locomotive, and its number
Center-right, the dark mechanical mass half-buried in the swirl, carrying a row of painted digits
The one solid, mechanical thing in the picture is the train engine, sunk to its shoulders in steam and curved line. On its body sits the single coldest, steadiest mark on the canvas: a stencilled number, read by the usual account as 6943. Everything else is in motion; the number is not. It is the one element that holds still while the world around it spins, the painting’s fixed point. (The digits are small and worked into the paint, so the exact reading is the standard one rather than a thing you can count off cleanly from a photograph.)