NK was formed by the Tamidei HaGra from the old yishuv (Rav Amram Blau zt’l, etc.) and they continue following the minhagim of the Vilna Gaon. The NK was a breakoff from the Agudah; while Rav Amram led the NK, his brother Rav Moshe Blau led the Agudah.
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