Simplified variant sold London (Sotheby's 8.iv.81) possibly claiming to be JBI; see catalogue. This was resold Paris (Drouot, 24.vi.94 #65) as JBI. It's copper, 20.8 x 28.8; composition is in between this & Ertz 1979 #99. Another variant, oil on copper, 36.3 x 55.3, sold Sotheby's London 28 October 2004 #23. It uses landscape of this one but figure group is, as catalog says, based on a drawing in Hamburg reproduced Ertz 1979 p.134, fig.140.