#171

For this issue, the cover has "No. 171" on it, but the indicia still reads like the U.S. edition, which numbers as 229; since the Issue Number definition is supposed to be the Indicia numbering, that is what is stated, with the cover number in brackets. Other issues use a Date System for the stamp in the white circle, which represents the date of publication or on-sale date; to that end, the 171 might signify this was published January of 1971 (with the original U.S. copy on sale in December 1970 but cover dated February 1971).