Mini Sheet is square format.Although this edition was authorized by the Niger postal administration, it was not sold in Niger, but only distributed to the novelty trade by the Nigerian philatelic agency.
Also in the issue Parker Probe (2018):
Data entry completed
|Mini Sheet Launch of the Parker Probe in digits|
|Face Value:||4*800 West African CFA franc|
Mini Sheet Launch of the Parker Probe it reflects the thematic directions:
For more information about Launch of the Parker Probe, you can search for GOOGLE