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

Only part of the movement is visible and the rotor hides several bridges. Which details can be described without claiming certainty?

Review focus: comparison. Make the basis of a comparison explicit before interpreting it. Use the original answer fragment “Describe visible bridge shapes and markings separately…” as the discussion anchor; no new event or result is supplied.

Exercise RWI-28278/73: address this question within its stated limits.