It's been estimated that Apple may have sold as many as 69 million iPhones during the holiday quarter, a figure that is more than 18 million higher than what the company moved during the same period a year ago.

While we're still waiting on official numbers from Apple, two of its key suppliers recently reported December revenues that are off the charts thanks to the early success of the new iPhones.

Taiwan Semiconductor Manufacturing Company (TSMC) announced revenues of NT69.51 billion, or roughly $2.17 billion, for the month of December. Hon Hai Precision Industry (otherwise known as Foxconn), cleared a whopping NT$515.57 billion which translates to $16.24 billion during the same period.

These figures all come courtesy of regulatory filings with the Taiwan Stock Exchange.

Those estimated 69 million handsets sold could likely have been much higher had inventory held up. Apple retailers in the US, for example, only started listing the new phones as "in stock" this past week meaning that there were no doubt some that didn't get the Christmas gift they wanted simply because it was sold out everywhere.

Apple's conference call to discuss its quarter results is scheduled for January 27 and while the company likely won't reveal which of the two new iPhones was the top seller, we'll know how many combined units were sold during the three-month holiday period.