Pinchas Kremer served as the secretary of the Nusach Ari Anshei Lubavitch synagogue. He corresponded with the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson, on behalf of the synagogue's congregants regarding communal practices and charitable activities.
The Rebbe's letter to Pinchas Kremer (24 Kislev, 5712) responds to a query about the proper custom concerning the wearing of a tallit by the shaliach tzibur (prayer leader) during Kabbalat Shabbat and Mincha on Shabbat in a Nusach Ari shul. The Rebbe clarifies the established Lubavitch custom—transmitted from his father-in-law, the previous Rebbe, and printed in Hayom Yom—that the shaliach tzibur does not wear a tallit for Mincha or Maariv on Shabbat, Yom Tov, or Rosh Hashanah. He emphasizes that only during weekday morning prayers and Yom Kippur is the tallit worn in this manner.
The Rebbe also addresses the importance of communal harmony, advising that if the Lubavitch custom can be implemented without causing dispute, it should be followed. However, if there is a risk of discord, peace takes precedence, and certain concessions may be made, especially regarding Mincha on Shabbat, but not for Kabbalat Shabbat, due to concerns mentioned in halachic sources. The Rebbe concludes with a blessing for the preservation of Jewish customs and notes the spiritual and material success that comes from upholding them.