In our opinion are all these rarities & varieties made for the collectors.
Any additional information or images would be very appreciated.
The series of 11 stamps were locally overprinted with the text:
“Conférence National Souveraine 3 mars – 4 décembre 1991 - 1992” + new value.
Note: I could not find any specific on these dates and the extreme high values makes this series doubtful.
Date of issue: 1991
Expiration date:
Circulation: unknown
No 1289A. 2,000,000z on 20z, brown

No 1417A 3,000,000z on 120z, “Le Volcan de Niyara Gongo”

No 1054A-1057A. 4 x 5,000,000z on 2z (no
484 + 1473
Issued: 1992

No 1253A 15,000,000z on 2Z

No 1256A 15,000,000z on 10Z

No 1274A 20,000,000z on 30z

No 1314A 25,000,000z on 25z

No 943A 30,000,000z on 1k

Block 67A. Perforated with new value of 25.000.000z on 50z.
Overprint in red/brown and in black

Block 67A. Perforated with new value of 50.000.000z on 50z.
Overprint in red/brown and in black

Originally issued on
Regideso is the national water and electricity authority. They are responsible for all production and distribution.
The series were locally overprinted with the text:
“
Date of issue:
Expiration date:
Design:
Printing: Harrison and sons limited,
Overprinting: locally
Perforation: 13.5 x 14.25
Size: 47 x 33 mm
Sheet: 50
Marginal inscriptions:
Circulation: unknown
No 1327A. 900.000z on 40z, Administration building (no 1327)
No 1328B. 600.000z on 50z, Modern factory (no 1328)
No 1329C. 1.500.000 on 75z, Old water terminal (no 1329)
No 1330D. 2.000.000 on 120z, Modern terminal (no 1330)
The series:

Originally issued on
The series were locally overprinted with the text:
“
Date of issue:
Expiration date:
Design:
Printed: Harrison and sons limited,
Overprinting: locally
Perforation: 13.5 x 14.25
Size: 47 x 32.5 mm
Sheet: 50
Marginal inscriptions:
Circulation: unknown
No 1414A. 900,000 on 40z, “Escaliers de Venus ‘Mont Hoyo’” (no 1414)
No 1415B. 1,000,000 on 60z, “La Route de Beauté” (no 1415)
No 1416C. 1,500,000 on 100z, “Le Lac Kivu ‘Zaïre Touristique’” (no 1416)
No 1417D. 2,000,000 on 120z, “Le Volcan de Niyara Gongo” (no 1417)
The series:


Block 67A. Perforated with new value of 5.000.000z

Note: I have no information if block 67A imperforated with new value exist.
Block 66A, originally issued on
Date of issue: June 1992
Expiration date:
Circulation: unknown
Overprint in gold “Du 8 au 15 – 6 - 1992
2e Conference Addis Abeba “Virus VIH 1 et VIH 2 en Afrique.
10,000,000Z”
Issued: 1992
