Is it permitted to convert head tefillin into hand tefillin when the tefillin have never been worn?

Daily LifeTzitzit & TefillinTefillin

Synopsis

The Mechaber rules that brand-new head tefillin that have never been worn may be converted into hand tefillin, because 'designation alone is not a significant act' (hazmana lav milta). One covers the four-compartment box with a single leather cover so it appears as one compartment.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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