The Broken Watch Strap is a historical item which can be found by Anna in Paris during Chapter 2.
Location[]
Pick up a coal from the fireplace and take it to the balcony, then throw it at the birds on the opposite ledge to knock the collectible down to the street. Once you get outside, shoo the flock of birds then pick up the item next to the drain.
Description[]
"A watch strap broken by a motor crank handle. Before battery ignition was developed, motor cars were started by cranking a handle. As the engine sparked into life, the operator had to let go of the handle smartly, because
the crank handle now propelled by the engine could cause a nasty accident."