The Posts and Telegraphs Department of Mauritius released on 8 February 1991 a Special Cover to mark the inauguration of Eau Coulée Post Office.
Eau Coulée is a locality of the town of Curepipe. It lies in the centre of the island in the Plaine Wilhems District.
Prior to 1991, no post office serviced Eau Coulée. If I am not mistaken, the closest Post Office was that of Curepipe Road, now closed.
Four Post Offices currently service Curepipe: Curepipe, Eau Coulée, Floréal, and Forest Side.
Release date: 8 February 1991
40c - Sir Aneerood Jugnauth at desk
From the '60th Anniversary of Prime Minister Sir Aneerood Jugnauth' issue of 29 March 1990
Rs1.50 - Whimbrel (Numenius phaeopus)
Rs3 - Submarine View
From the 'Protection of the Environment' definitive issue of 11 March 1989