As a follow-up of @user24582 correct answer:
The C-Visa issued for Austria was issued by France:
- France
- Austria, Belgium, Czech Republic, Estonia, Germany, Greece, Iceland, Italy, Luxembourg, Portugal, Slovenia and Spain
- Switzerland
- Hungry, Netherlands, Norway, Poland and Sweden
- Unknown
- Denmark, Finland, Latvia, Lithuania, Malta, Slovakia
Other sources:
- List of diplomatic missions in Madagascar
- Annex 22 1 National entries in the "comments" section of the visa sticker
- with a list of country specific codes/remarks