Apple's iWatch will likely have a circular face, analyst Brian Blair of Rosenblatt Securities said.
In a May 27 report on the Asia supply chain, Blair said that models of the iWatch exist, including ones with sapphire screens. Although TPK will make the touch panel for the device, Blair said it could have a sapphire glass overlay. The same report said the upcoming iPhone 6 would use sapphire glass from GT Advanced.
Motorola plans to release its own circular, Android-based smartwatch this summer. Apple's device will likely have "a slimmer profile" than the Moto 360, Blair said in the report. Like Samsung's Galaxy Gear watch, LG's planned smartwatch will have a rectangular face, but on May 27 LG launched its G3 phone with a circle-shaped active display visible through a special cover, a release said.
The report said that Quanta, the world's largest maker of laptop computers, will produce the iWatch, rather than Hon Hai. All companies involved with manufacturing the new Apple wearable are based in Taiwan.
The iWatch will likely go into production in late July or early August with a revised range of 18 million to 21 million units, up from an initial forecast of 15 million to 20 million, Blair said.
Technology research firm Strategy Analytics said if Apple does not release the device by the holiday season during the fourth quarter of 2014 as expected, it will have to delay a launch date to next year.
In response to the reports, Apple "declined to comment on rumor or speculation."
—By CNBC.com staff.