特257經濟建設郵票─科技發展
- S257.1
quantity : 3,000,000 - S257.2
quantity : 1,600,000 - S257.3
quantity : 3,800,000 - S257.4
quantity : 1,600,000 - S257.5
quantity : 3,000,000 - S257.6
quantity : 2,400,000 - S257.7
quantity : 1,600,000 - S257.8
quantity : 3,000,000