Seeing as how late in the day it was for Kelly back in 1972, what with his diminishing style, this looks to me like it could be one of the reprints that started to run during his illness. But I haven't had the time to look through the archives to see if that is so, and if so, from when. Still this is part of the canon and is the start of another sequence that runs right into some strips that definitely reflect the toll that diabetes exacted from Kelly.
Kelly's explosions are always graphically fun.
Good morning to you across the Atlantic, as it is still night-time here in the U.S., as I toddle off to bed. Happy Sunday, Kelly Sunday!
June 11, 1972