What's FOR PHILATELY?
This cancellation was used for this postal card's first day of issue during the Japanese occupation (with control number 4. There are 10 control numbers in all).
The original of this postal card (without the overprint) was issued on May 17,1943. It was overprinted for official business use (that's what "K.P." means).
Was Mr. Alfonso Zobel a philatelist?