Reference: HK193
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___ (17.12.2018) - Definitive issue.
Code PGPO01 - General Post Office.
Cover mailed to Spain, priority mail - 2019 ($4.9). 'General Post Office' pictorial postmark.
Reference: HK193
Reference: HK191S9R
Reference: HK193R
Reference: HK194S10R
Reference: HK193S5R
Reference: HK192CE1
Reference: HK191CEM
Reference: HK191
Reference: HK195R
Reference: HK192S5R
Reference: HK191S5R
Reference: HK191RE
Reference: HK192CM1
Reference: HK19X3
Reference: HK192S9R
Reference: HK193S9R