Six various prayer books and machzorim, in a large format for the prayer leader. * Siddur and Machzor Kol Bo, part one, for weekdays, Rosh Hashana, and selichot before Rosh Hashana and the Ten Days of Repentance. Vilna, 1904, Ashkenazi liturgy, printing press of the Widow and the Brothers Romm, title page in red ink. * Siddur and Machzor Kol Bo, part two, contains the prayers and piyutim and selichot for Yom Kippur, Vilna 1904, Ashkenazi liturgy, printing press of the Widow and the Brothers Romm, title page in red ink. * Siddur and Machzor Kol Bo, part one for Rosh Hashana, Sephard liturgy, Vilna 1923, printing press of the Widow and the Brothers Romm. Pages not cut. * Siddur and Machzor Kol Bo, part two for Yom Kippur, Sephard liturgy, Vilna 1923, printing press of the Widow and the Brothers Romm. Prayers, piyutim and selichot for Yom Kippur. Pages not cut. * Siddur and Machzor Kol Bo, part three for the festival of Succot, Vilna, 1923, printing press of the Widow and the Brothers Romm. Pages not cut. * Siddur and Machzor Kol Bo, part four for Pesach and Shavuot, Sephard liturgy, Vilna 1923, printing press of the Widow and the Brothers Romm. Pages not cut. All of the prayer books and machzorim are in large [identical] format, 43×29 cm. All of them have laws and customs for the entire year from Rabbi E. Tirna, customs of the old synagogue in the city of Ostroh, with comments from the Aderet. All do not have a binding, and all are in moderate-fine condition.