My string of luck is continuing. New-to-me 68 Lo-boy I'm mowing with while the zero turn is OOS had the key fell out somewhere today while mowing. Walked all over hoping it would jump out in the sun light, but no luck. Ordered equivalent of 131313C1 and hope it works, but will take a few days to get here. Needed to finish the front so about a 3/8 flat blade fit good enough to work hopefully without causing any damage. Lesson learned, ordered a couple of bright orange key chains like old style hotel keys.