Yep it's a radio shack 1/4 wave. I still have the base to mine I bought in 1974. We discovered that we got gain if we bent the radials down at about 60 degrees like a Starduster, but had to either lengthen or shorten the hairpin, I can't recall which. Seems it went out to about a foot long but it's been too many decades to remember.
Thanks for the memories {Cry_river}
Thanks for the memories {Cry_river}