Tinka drills 7.2 metres grading 22.7% zinc and 5.7 metres grading 14.9% zinc at Ayawilca https://www.newswire.ca/news-releases/tinka-drills-72-metres-grading-227-zinc-and-57-metres-grading-149-zinc-at-ayawilca-689729021.html Tinka Resources Limited 07:00 ET