Ambassadeur 2500C (A-A25-00C-0-040-M-C) This is the last month an Ambassadeur 2500C utilized the rare soft box. All soft box was replaced by the hard box after June 1976. An interesting Counter Balance Handle seen on an Ambassadeur 2500C. This handle was fitted on some Ambassadeur 2500Cs from October 1975 until it fully replaced the Twin Knob Handle in October 1976. Jun 1976, Nil Revision An undated schematic diagram from Garcia indicating the transition between Double Twin Knob Handle and Counter Balance Handle.