Sourced from Kath Dryden around the turn of the millennium. Kath's catalogue provided no information about provenance. The literature contains various references to this hybrid (both natural and man-made).
The Frit Group ‘Journal’ No13 Pg21 (Autumn 2003) refers to a wild hybrid F. aurea x pinardii collected by Martyn Rix under the number Rix1603.
The Roger Phillips & Martyn Rix book 'Bulbs' contains photos of Rix1601 & Rix1602 (found in central Turkey). The example of Rix1602 in this book looks like my plant. The text refers to hybrids made between Rix1602 and F. aurea. Rod Johnson had seedlings of F aurea x fleischeri (F. fleischeri is a synonym of F. pinardii). The source of Rod’s seed is unknown.
The Kevin Pratt book has a picture of this hybrid but it is much closer to pinardii than my own plant.
Bob & Rannveig Wallis had a plant of Rix1602 at Chesterfield 2010 but this did not match my own plant (alas I have no photo!)