Schweizerische Bundesbahnen has accused Apple of using their clock in the iOS 6 Clock app for iPad without permission, according to a report in the Swiss newspaper Blick (translated).
The clock was designed in the 1940s by engineer and designer Hans Hilfiker (1901-93). According to Wikipedia, the clock has become a national icon.
The clock's image has been widely licensed. For example, the watchmaker Mondaine sells replicas around the world. According to the report, however, Apple did not make any attempt to do so, in terms of its new Clock app.
Apple has not yet responded to requests for comment.
You can watch a clock in action, in the embedded video.