This issue is a variant of Daredevil (Marvel, 1964 series) #136 [25¢].
There exist further variants.
From a cover sketch by Ed Hannigan.
Letters of comment from Glenn Rowsam (Oakland, CA), Jesse Carpenter (Palo Alto, CA), Bill Kelm (Chula Vista, CA), and Rene Blansette (Carrollton, KY). Also Marvel Value Stamp (Series B) No. 5 (Stan Lee).