An interesting piece of work this is. This is a real hard drive being converted into a fully functional clock. While it doesn’t have the numbers, it does have the hour, minute and second hands; and is powered by one AA battery. But don’t think that he only made one, he has made another 16 (according to his profile) – so this could be a great geeky gift for your mother, or for a birthday.
You can get the one shown above for US$35.00 from Etsy.