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Really
picture.....thanks to Dave for submitting and to Bruce for posting
I see the road sign for Alt. 19 at the intersection in the background. I remember that Alt. 19 was (or perhaps still is?) the main north - south road through the Gulf Coast towns of Tarpon Springs, Clearwater, and St. Petersburg. My grandparents lived just south of Tarpon Springs back in the 60's, but I don't recall any drag strips in the vicinity.....they may have been farther inland.
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It is also one of those color-coded signs Florida used to dstingiush direction and destination !