SA postmark – Belfast Centenary
Date: 07.05.1980 – First Day of issue for the sheet
Postmark: Centenary logo
Cachet: Cotswold cover
Stamps: Souvenir sheet London 75p
Remark: These Royal Mail stamps were affixed to specially designed envelopes and postmarked on the first day that the stamps were issued – often with special designed postmarks.
Cat. value: (BFDC) £15