Shares of Apple (Nasdaq: AAPL), the world's most valuable technology company, set their first record high since April, briefly hitting $644.13 in early Friday trading. That beat the previous record of $644 set on April 10.

The Cupertino, Calif., company has been coy about new products but analysts and industry publications have speculated on upgrades to the iPhone 4S, iPad and other lines scheduled for sale during the fourth quarter.

On Friday, Jefferies analyst Peter Misek told clients the so-called iPad Mini "is in production" based on checks with supply chain manufacturing sources in Taiwan. He also said an iPhone 5 or other product to succeed the iPhone 4S will be introduced next month for fourth-quarter sales.

After setting the record, Apple shares eased slightly and traded at $642.65, up $$6.51, valuing the company at nearly $603 billion.