themarksproject.orgUndatedPRIETOObserved example dated 1960; this does not establish a mark-use interval.
themarksproject.orgUndatedPRIETOObserved example dated ca 1964; this does not establish a mark-use interval.
themarksproject.orgUndatedPRIETOObserved example dated ca 1955; this does not establish a mark-use interval.
themarksproject.orgUndatedPRIETOObserved example dated ca 1960; this does not establish a mark-use interval.
themarksproject.orgUndatedPRIETOObserved example dated ca 1960; this does not establish a mark-use interval.
themarksproject.orgUndatedPRIETOObserved example dated ca 1960; this does not establish a mark-use interval.