Supreme Court of the Netherlands: ‘Blue Hawk’ case: conversion of the Gold Franc; decision of 1 May 1981 - Air and Space Law View Supreme Court of the Netherlands: ‘Blue Hawk’ case: conversion of the Gold Franc; decision of 1 May 1981 by - Air and Space Law Supreme Court of the Netherlands: ‘Blue Hawk’ case: conversion of the Gold Franc; decision of 1 May 1981 6 3 Air and Space Law