What is the best type of locking mechanism for a watch band?

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For a secure watch band locking mechanism that cannot be removed by the wearer, options like cuff-style locks, ankle bracelet designs, or cable ties are suggested. The preference is for a mechanism that does not require a key or any external source that could be lost. Bluetooth locks were mentioned but raised doubts regarding their reliability for this purpose. The discussion emphasizes the need for a practical solution that ensures the watch remains securely fastened. Overall, exploring existing technologies in personal restraints may provide viable locking mechanisms for watch bands.
Tanhan
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Can anyone help me in what they think would work as far as placing a locking mechanism on a watch band??

I need it to lock onto the wrist. So it can not be taken off by the wearer.
I do not want it to need any type of key or source that can be lost.
I have been recommended a bluetooth type of lock, but am not totally convinced it would work.

Any and all advice is VERY welcome. Thank you Thank you!
 
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The technology you should search is probably; hand cuffs, ankle bracelet or cable ties.
 
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