The Tourbillon Mechanical Watch compensates for the gravity - induced gain or loss with its mobile carriage . The Tourbillon Mechanical Watch , whose carriage is mounted on one side only , with no supporting bar , allows better visibility through the cutout window at 6 oclock . The watchs face ( and back ) is made of sapphire glass , making it scratch - resistant . The Tourbillon Mechanical Watch is a limited edition .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason consumers will buy the watch immediately ?
Options:
- The number of these timepieces is restricted .
 - The Toubillon is made of sapphire glass which is now limited .
 - The Tourbillon Mechanical Watch will not be sold after 6 oclock .
 - None of the above choices .


The number of these timepieces is restricted .