Responsa for Shabbat 124:3
חסורי מחסרא והכי קתני וכן בכובלת וכן בצלוחית של פלייטון לא תצא ואם יצאה חייבת חטאת דברי רבי מאיר רבי אליעזר פוטר בכובלת ובצלוחית של פלייטון במה דברים אמורים כשיש בהם בושם אבל אין בהם בושם חייבת
— There is a lacuna, and it was thus taught: And she may likewise not go out with a kobeleth or a flask of spikenard oil; and if she does, she incurs a sin-offering: this is R. Meir's view. R. Eliezer holds her non-culpable in the case of a kobeleth and a flask of spikenard oil. When is that said? When they contain perfume;<span class="x" onmousemove="('comment',' Then they are ornaments. ');"><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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