紀257郵政一百週年紀念郵票

• C257.1
  
  quantity : 5,100,000
• C257.2
  
  quantity : 4,100,000
• C257.3
  
  quantity : 4,100,000
• C257.4
  
  quantity : 4,100,000

• C257.5
  
  quantity : 2,500,000張