ANGOLA

Var: this 1970 sheetlet features transport, with a background showing the lovely Duque de Branganca Falls, and commemorates 100 years of postage stamps.

NIGER

500fr: this Columbian issue features the portrait inset and one of the explorer's ships

DJIBOUTI

100fr: this transport issue celebrates African relations with France

MALDIVES

R7: this global warming issue shows the peril of melting ice for ship transport

MAURITIUS

R1: this 2001 issue celebrates the Baudin geographical and natural history expedition

CHAD / Tchad

200fr: this large format issue shows a sailing vessel on Lake Chad

SENEGAL

525fr: the slave port of Goree is pictured on this 2007 issue; the site is now a historical museum and UNESCO World Heritage Site

TANZANIA

Sh. 50 and Sh. 75 se-tenant pairs: this intriguing issue shows early stamps and mail transport

NIGER

100fr: this local river scene features a stamp-on-stamp design for the centennial of the birth of Sir Rowland Hill, with a clear cancel from Agadez

ZAIRE

80z: this 1988 issue is a high value of a set showing air transport and planes; showing various hot air balloons, the oldest form of manned air travel, developed in 1783. A clear town cancel can be seen from Bukavu, South Kivu Province

EQUATORIAL GUINEA / Guinee Equatoriale

350fr: this 1991 issue shows one of the sailing ships of Columbus, and bears the symbol of the 500th anniv. of discovery

TRISTAN da CUNHA

50p: this stunning Halley's Comet issue comes from the tiny British Atlantic possession of Tristan da Cunha, home to just 275 and considered the most remote inhabited archipelago on earth, lying 1,750 miles east of South Africa

MADAGASCAR

500fr: this large and colorful issue of 1983 celebrates the 200th anniv. of the first ascension of a manned air balloon

UGANDA

Sh. 200: this Columbus issue of 1992 shows sailing vessels of the 15th century and a navigational astrolabe

ZANZIBAR

Sh. 800: Zanzibar forms a union with Tanzania, and many stamps show typical island scenes such as this 2003 issue which shows a dhow off Zanzibar's coast

BENIN

150fr: this 1997 series shows the history of ships; pictured here is a typical Greek merchant ship. This stamp was postmarked in Cotonou.

CAPE VERDE / Cap Vert

10e: this 2003 issue celebrates 75 years of air mail service between Africa, Europe and the Americas, with the 1st Dakar-Praia flight in 1928

DJIBOUTI

70fr: this issue shows traditional alongside the modern Djibouti-Ethiopian railway

ALGERIA / Algerie

38: This stamp was issued in 2010, when OPEC celebrated its 50th anniv. Here, an oil tanker is shown leaving port.

IVORY COAST / Cote d'Ivoire

30fr: Modern transport is pictured on this 2005 issue, in myriad forms. At lower right is a water taxi.