I thought I'd collect all my photos of this fan variation.
It wasn't hard.
This one looks to be 1940s-50s
From an online auction
Seems to be the only photo I have of the pattern
The Ladies' Art Company published it as Rainbow
The Quilt Index has a page with the LAC diagram.
Butterick published a pattern for this fan like Sun-Burst (half a sunburst)
design in 1889.
George Snyder posted this early 20th-century Georgia quilt on
our QuiltHistorySouth Facebook page.
Just three double fans amidst the squares, rectangles & triangles.
Half a plate
A few quilters have used this half a circle set
This one from the Oregon Project and the Quilt Index.
It's a fairly easy way to get a complicated look.
Out of print pattern.
If you rotated every other row and did a half-drop repeat......