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Apple Watch will be huge by the end of 2016: Pro

Apple will soon begin accepting orders for what the company calls its most personal device yet: The Apple Watch.

Gene Munster, senior research analyst at Piper Jaffray, is bullish on the new device, but said it will take a year and a half for the device to really catch on with the public.

"The reviews make us believe that this is going to have an initially good adaption from the Apple enthusiasts but will probably take a little bit of time, a few quarters for the average consumer to get excited about going out and buying," Munster told CNBC's The Tech Bet on Thursday.

"We believe the the watch is going to be a huge category—10 plus percent of Apple's business—but it's going to take six quarters to get there," said Munster.

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Munster says Apple watchers shouldn't judge the success of the watch on the first few months of release. He notes that as more developers get involved, the watch will have richer apps that will help drive interest and sales.

Munster expects Apple to sell 300,000 units in the first 24 hours of availability. He also expects Apple to sell 1 million watches, including pre-orders, during its opening weekend on April 24.

Apple will report quarterly earnings on Monday, April 27.

Disclosure: Munster does not own shares of Apple.