There was mail from the Royal Mail in Great Britain for me today— with South African stamps inside, of course.
I looked up the details of the stamps used on the envelopes.
Issued 1974, Oct. 9. | Perf.14×15 | ‘All-over’ phosphor Gum
962 444 4½p | Prussian Blue, pale turqoise-green and silver | Churchill in Royal Yacht Squadron Uniform
[Source: 1997 Stanley Gibbons Stamp Catalogue Part I Volume I]
Issued 2023 | Perf. 15×14½ | Gravure print with phosphor bars | Bar-coded | Self-adhesive
£2.20 Dark green Portrait of His Majesty King Charles III
[Source: royalmail.com]