Kutter, the date stamp and the ledger number was used solely by the Z-M facility save a couple of months from September 1923 to say March/April of 1924 when the Suhl proofhouse for some reason used it. Yes, Barella phoned or telegraphed a subcontractor in the Zella Sankt Blasii or Mehlis area and placed the order more than likely after he had a client place an order with him. Images of any other marks might just point to that maker.

Kind Regards,

Raimey
rse