A striking hand-blown art glass oil lamp designed by Hans Jürgen Richartz for the Richartz Art Collection, Germany, 1970s. The bulbous, teardrop-shaped body in opaline white glass features abstract trailed decoration in black and deep violet/aubergine tones — a hallmark of Richartz’s marbled glass technique — mounted on a clear glass pedestal foot. Signed on the base. Dimensions: height 13 cm, diameter 11 cm Design: opaline white art glass body with abstract black trailing and violet/purple accents, clear glass stem and circular foot Signature: signed “Richartz Art Collection” on the underside of the base (see photos) Condition: excellent, no chips or cracks; the wick/burner mechanism is missing, so the piece is offered as a decorative art object rather than a functional oil lamp Style/Period: West German studio art glass, 1970s A genuine collector’s piece by a well-documented German glass designer, ideal for lovers of 1970s studio glass and Mid-Century decorative art.