Signature of the American filmmaker, artist, and Eagle Scout David Lynch.
Extracted and traced from a scan of the blue sticker used to denote "Director-Approved" editions of Lynch's films within the Criterion Collection, the first of which was Eraserhead (1977; Criterion #725 Blu-ray edition released on September 16, 2014). A photo of the sticker can be seen at Imgur (uploaded September 10, 2014).
David Lynch