Colombia 1953 Post Office 25c strip of 3 with opt doubled, one obliquely unmounted mint (SG 771a but unpriced)
Colombia 1953 Post Office 25c strip of 3 with opt doubled, one obliquely unmounted mint (SG 771a but unpriced)
Colombia 1953 Post Office 25c strip of 3 with opt doubled, one obliquely unmounted mint (SG 771a but unpriced)