RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-28278

Case 73 — Movement identification: the limits of a rotor photograph · comparison exercise

Reader check for “Movement identification: the limits of a rotor photograph”: distinguish the discussion point “Describe visible bridge shapes and markings separately…” from its proposed application. The thread offers a way to reason about the question, without adding a personal experience or a newly observed outcome. Review focus: comparison. Make the basis of a comparison explicit before interpreting it.