Weekly Shonen Jump #556

When was Weekly Shōnen Jump #556 published?

Weekly Shōnen Jump #556 has a cover date of August 15, 1979 (it went on sale earlier, on July 20, 1979), published by Shueisha in Japan.

Which manga series were featured in Weekly Shōnen Jump #556?

Weekly Shōnen Jump #556 (cover-dated August 15, 1979) featured 5-nin no Guntai, Gyaru Keiji, Tomato, Mr. Lady, among other ongoing serializations.