Johnny Van Haeften
... that stamp collecting gave Johnny Van Haeften the eye for detail that is essential in dealing in old master Dutch paintings?
... that stamp collecting gave <b id="mwCZ8"><a href="./Johnny_Van_Haeften" id="mwCaA" rel="mw:WikiLink" title="Johnny Van Haeften">Johnny Van Haeften</a></b> the eye for detail that is essential in dealing in <a href="./Old_Master" id="mwCaE" rel="mw:WikiLink" title="Old Master">old master</a> Dutch paintings?