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Just because the below authorities wearing Techeiles are listed doesn’t mean we have contact info on all of them. This is for informational purposes only.
Young and bright, R’ Yankelowitz was mentioned by R’ Bentzion Twerski as the one who convinced him of the murex’ authenticity. He also tied Tzitzis for Rabbis Yisroel Belsky ZT”L, Zalman Nechemia Goldberg ZT”L, as well as Ben Shapiro.