A commemorative stamp depicting a major harp sea snail, Harpa major. It was issued on 5 April 1973 and has a face value of 40 francs. The stamp is cancelled with a postmark that is possibly from Ambanidia.
Text from the stamp
Repoblika malagasy 40F Postes 1973 harpa major Baillais [Odette Baillais]
