RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-26934

Case 49 — Movement identification: the limits of a rotor photograph · source wording exercise

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

Review focus: source wording. Retain the source wording beside any paraphrase. Use the original answer fragment “Ask a qualified watchmaker to inspect it if identification matters for…” as the discussion anchor; no new event or result is supplied.

Exercise RWI-26934/49: address this question within its stated limits.