Thu Apr 30, 2015 6:31pm EDT

Apple Inc's Watch has the lowest ratio of hardware costs to retail price across any Apple phone, according to a preliminary estimate by research firm IHS after a teardown study.

The hardware cost of an Apple Watch Sport model was about 24 percent of the suggested retail price compared with 29-38 percent for the iPhone maker's other products, IHS said on Thursday. 

The Apple Watch Sport 38 mm costs $349 and the teardown shows a bill of materials of $81.20 with the cost of production rising to $83.70 when $2.50 in manufacturing expense is added, IHS said.

(This version of the story corrects the first paragraph to say Apple phone, not Apple product, after IHS amends report)