Shiur on Techeiles and live demonstration of Murex trunculus

A shiur on the mitzva of  Techeiles will take place Sunday night at 8:45 pm in bais medrash Khal Chasidim in West gate 1 Brisk Lane. The shiur will be given by Rav Bentzion Halberstam shlita. A live Murex Trunculus will be on hand followed by a live demonstration of the Tcheiles dye by Rabbi Yechezkel Toporowitz.