
'The Panama Canal Canal Zone Official Business' PENALTY envelope with 'Official Business' crossed out franked with 1927 3c violet USA overprint issue (SG 104) tied by BALBOA HEIGHTS roller cancel. Addressed to USA.
'The Panama Canal Canal Zone Official Business' PENALTY envelope with 'Official Business' crossed out franked with 1927 3c violet USA overprint issue (SG 104) tied by BALBOA HEIGHTS roller cancel. Addressed to USA.