Some require that both the watch and band be made of gold, while others permit it if either one of them is gold. [Perhaps, a brand-name watch, which is worn primarily for its status, is comparable to the gold watch of past generations.]
See Beiur Halachah 301:11 (ה"דהזב); Minchas Shabbos 84:5; Chelkas Yaakov 97; Shemiras Shabbos Kehilchasah 18:27; Yechaveh Da’as 3:23.
Chelkas Yaakov 96; Igros Moshe 1:111; 5:24-10; Rav S. Z. Auerbach (quoted in Shemiras Shabbos Kehilchasah 18, footnote 113). See Megilas Sefer 41:1-3 for a complete review of this subject.
Ketzos Hashulchan 115:16, note 28; Chazon Ish (Dinim V’hanhagos 15:8); Minchas Yitzchak 1:67; Tzitz Eliezer 11:28; Chut Shani 88:2. This seems to be the opinion of Mishnah Berurah and Aruch Hashulchan as well.
Igros Moshe 1:111.
Chut Shani 88:2. See Orchos Shabbos 28:136.
