Agan Ha'Sa'ar. Only Edition. New York 1954. Inscribed by the Author!

Agan Ha'Sa'ar. Only Edition. New York 1954. Inscribed by the Author!
Comprehensive sefer on the International Dateline and the laws of Kiddush HaChodesh by the renowned Gaon, R. Aaron Chaim Zimmerman. In the early 1950’s when the halachic status of the International Dateline was the subject of considerable debate, (R. Yechiel Michel Tukatchinsky and the Chazon Ish had both published works on the topic), R. Chaim Zimmerman published his best-known sefer Agan Ha’S’Har. He is said to have considered that only a limited few could understand his sefer and therefore printed a very limited edition of only several hundred numbered copies. His most famous disputant was R. Menachem Kasher, with whom the author engaged in this sefer following R. Kasher’s sefer Kav Ha’Ta’arich on the subject.
R. Aaron Chaim Zimmerman (1914-1995) was born in Konotop, Ukraine to R. Yaakov Moshe Zimmerman who was a brother-in-law of R. Boruch Ber Leibowitz. He was known as a prodigy from a young age and as a teenager he studied with his uncle R. Boruch Ber in Kaminetz. He immigrated to the U.S and received Semicha from R. Moshe Soloveitchik. In his first published work, Binyan Halacha (1942), Chief Rabbi Herzog attests that the young author was fully knowledgeable in the entire Talmud Bavli and Yerushalmi, Rishonim and Achronim. He served as Rosh Yeshiva in the Skokie Yeshiva in Chicago until 1964 and then resided in Jerusalem until his passing.
On the flyleaf is a short autograph inscription by the author.
Shusterman press. 10, 490, 4 pages. 25 cm. Excellent condition. Regal paper. Original binding.
Opening bid $350