1917 Manila (24 Jan) to Chuanchow, frankless, applied with “Anhai Post Office / Registered Bulk Mail Letter” cachet on reverse. With
1917 Manila (24 Jan) to Chuanchow, frankless, applied with “Anhai Post Office / Registered Bulk Mail Letter” cachet on reverse. With inner letter. Only two such incoming bulk mail known. 1917.1.24 馬尼拉寄泉州，無貼票，背鈐“安海郵局證明 / 挂號民局包封信件”直戳。附內信。為已知兩件進口包封信件零投例子之一。
