February 15th 1971. 17½p Grey (shades) plus blue "EXTRA 5½p PAID". Note on the back includes "overseas/until 1st July 1971 the fee is 15p..."
RP96. R316 (Grey) and RP316a (Slate-Grey) Size G.
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RP96. R317a. (Slate-Grey) As above but size H.
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RP96. R318a. (Slate-Grey) As above but size K. (Image reduced to 50%.)
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July 26th 1971. 23p Slate Grey, white linen (scrim) lining.
RP99. R321. Size G. 7½mm between dot after "label" and vertical blue line.
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As above but upgraded with ½p Machin (23½p rate came into force in 1973.)
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RP99. R322a. As above but size H.
"i" of "entire" under "io" of "Compensation" on reverse.
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November 6th 1972. Blue manila lining.
RP99. R325. Size H.
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October 1973-1974. 23p Slate-Grey plus blue "EXTRA ½p PAID".
RP99. R330. Size H. Dark brown gum (1974)
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October 29th 1973-74. Blue linen.
RP99. R333. Size G.
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As above but pink tinged paper inside, dark brown gum (27/3/74)
RP99. R334. Size G.
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As above but blue tinged paper inside, clear gum (Scotland)
RP99. R335. Size H.
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June-July 1974. 23p Slate-Grey embossed plus blue "EXTRA 6½p PAID". No compensation schedule on back, blue lining inside, pink tinged paper.
RP99. R340. Size G.
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RP99. R341. As above but size H.
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July 31st 1974. 29½p Blue letterpress, blue lining.
RP99. R342. Size G.
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February 4th 1980. 87p Blue, letterpress.
RP99. R370. Size G.
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RP99. R371. As above but size H.
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September 3rd 1984. £1.27 Blue, letterpress.
RP99. R382. Size G
Upgraded with 1p and 10p Machins. All stamps overprinted with Post Office bars for use in training schools.
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September 23rd 1986. Queen's Head omitted. Royal Mail/1/GREAT BRITAIN/MINIMUM POSTAGE AND/REGISTRATION FEE PAID.
R386. Size H. Letterpress, stamp 30½ x 26mm.
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Queen Elizabeth II Overseas and Forces Registered Letter Envelopes —
Decimal.
