Spelunker - Yellow
The classic Cumberland Caverns Spelunker patch was used for decades and has cloth back and plastic back varieties. By the late 1960s or early 1970s, they had switched from the red letter Spelunker patch to this yellow letter Spelunker. It was used thru 2015 and is found in almost every Middle Tennessee scout's patches that was very active during that period. It is the single most ubiquitous patch on vintage MTC patch jackets.