Koninklijke Vlaamse Ingenieursvereniging 1928-1978 

• 1978 
• 8 
• De Post [België] 
• Eerste-Dag Informatie Filatelie 1978 

Shown on stamp: Graphic representation of the Royal Flemish Engineering Association (K.V.I.V.) Michel number: 1963 Yvert number: 1906 Scott number: 1021 Stanley Gibbons number: 2539

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