This is what I was alluding to the other day about his clue (from the New York Times):
“And so Mr. Sanborn has decided to open the door a bit more with five additional letters, those in the 70th through 74th position.
They spell “clock.”
This means that the letters from positions 64 to 74 spell out two words: “Berlin clock.””
Sanborn didn’t say that 70-74 were in K4. The journalist assumed they were. The letters “clock” are in K5, not K4.
“When asked whether his new clue was a reference to this Berlin clock, Mr. Sanborn, sounding pleased, said, “There are several really interesting clocks in Berlin.””
Jim Sanborn didn’t put berlin and clock together, the journalist did. And then he seemed pleased that he had pulled off a deceptive maneuver by saying Berlin has interesting clocks. He doesn’t clarify the error, just plays along.