Rolex [Caliber 730] - Mainspring - 4000

The base item Rolex [Caliber 730] - Mainspring - 4000 carries the parts list number 4000 specifically for spare parts search for Caliber 730.

The special parts list of Caliber 730 explicitly refers for general parts to the diagram of Caliber 720. The technical reference image serves for traceable identification during overhaul, repair, and spare parts search.

For inspection, Caliber 730, part number 4000 and the designation Mainspring are checked together.

Later variants show the available original part, the documented condition, and the actual delivery scope.