I've always liked the Siebel, even though it could never be described as attractive.
It's possible that those in the first picture, and the location, were used in the 1960's movie 'Triple Cross', (Christopher Plummer and Yul Brynner) painted in spurious Luftwaffe colours. The hangar and apron certainly look the same, and it's logical that, being filmed in France, they'd use an available unit and location.