50e anniversary of Regideso, 1990

Regideso is the national water and electricity authority. They are responsible for all production and distribution.

First Day Covers (FDC)

Design:

Editor:

Note: Blanco or airmail envelopes are not shown here but do exist.

Philatelic material:

First Day Covers (FDC): not officially known

Note: Blanco or airmail envelopes are not shown here but do exist.