hi,nice to see everyone here again,this is a pair of china reaper stamps issued in 1915-26.I can notice there is one perforation hole missing on top left vertical side.There are only 16 holes instead of 17 holes normally on center and right vertical side of the stamp.Is this common on any other reaper stamp of china?Is it possible error?I need someone who is an expert of china stamps to help me on this,please give me your opinion and advice.thank you
