Written by Roxanne de Boom on Monday July 24th, 2017. Posted in €1.000.000 - and higher, 11 meters - 20 meters, Mulder Price reduction! Mulder 59 Hardtop Mulder 59 Convertible (with Hardtop) in NEW condition. Aluminium – 23 Knots. 3 cabin layout , Seakeeper Zero-speed Stabilizers. Perfect example Dutch Quailty motoryacht. Inspections highly recommended.