|Note_en={{Dating|seller}} Partially confirmed for the presence, on the other sheet side, of reference to some Touring Club publication edited up to 1930. Warning by the italian agent about a stamped trademark used to certify the [[overlay]] autenticity for model derived from the [[Waterman 4x|4x]] serie. | |Note_en={{Dating|seller}} Partially confirmed for the presence, on the other sheet side, of reference to some Touring Club publication edited up to 1930. Warning by the italian agent about a stamped trademark used to certify the [[overlay]] autenticity for model derived from the [[Waterman 4x|4x]] serie. |