Deletion of one P{wen.6} of P{2(wen.6)}6-6B leaving single P{wen.6} which has its 5' P element end deleted, at position 680 of the esg gene (coordinates as in FBrf0057128, bp 1000 is the beginning of the coding region), in opposite orientation to that of esg.
Eye colour: w- homozygotes have white eyes; heterozygotes have a dark orange ring.
P{3'wen.6} insertion is at the esg locus.