The Swiss établissage system separated ébauche manufacture from finishing and retailing. A single ébauche maker could supply hundreds of finishing shops, whose products were sold under retailers' names across Europe and the Americas.
So the dial name is often a shop, not a manufacturer. The movement's architecture is the more reliable evidence: the shape and number of bars, the position of the crown and ratchet wheels, the keyless works layout, the balance cock form and the setting-lever arrangement.
Look for small stamps. Ébauche makers applied trademarks, calibre numbers and sometimes fingerprint-like combinations of letters to the plates under the dial or beneath the balance cock. Case interiors carry assay, import and case-maker marks that indicate country and period of sale.
Reference material matters more than intuition here. Ébauche identification usually means comparing a movement against published calibre reference works and trade catalogues rather than searching a name.
Be explicit about what remains unknown. An honest record may read: 'Swiss, bar movement, cylinder escapement, keyless, Geneva-style finishing; ébauche maker unidentified; case with French import marks.' That is a complete and useful entry.
Attribution to a famous name should never rest on style alone. Signed plates, archive confirmation or documented provenance are what distinguish attribution from speculation.