Responsa for Shabbat 115:3
לא קשיא הא דעבד ליה רביה הא דעבד איהו לנפשיה
but not with a seal on his garments? There is no difficulty: in the one case [the reference is] where his master set it upon him; in the other where he set it upon himself.<span class="x" onmousemove="('comment',' In the former case he fears to remove it; hence he may wear it. But he is not afraid to remove it in the latter case, and possibly will. ');"><sup>3</sup></span>
Teshuvot Maharam
Q. May a person attach a metal buckle to his girdle as an ornament, and then file the buckle into the shape of a key with which he can unlock the door of his house, and then wear this buckle on the Sabbath?
A. People do not usually wear metal keys on their girdles as ornaments. Therefore, this key is not considered an ornament and he is not permitted to wear it on the Sabbath.
SOURCES: Pr. 532; Mord. Shabb. 350; Hag. Maim. to Shabbat, 19, 4. Cf. Maharil, Responsa 84.
A. People do not usually wear metal keys on their girdles as ornaments. Therefore, this key is not considered an ornament and he is not permitted to wear it on the Sabbath.
SOURCES: Pr. 532; Mord. Shabb. 350; Hag. Maim. to Shabbat, 19, 4. Cf. Maharil, Responsa 84.
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