Board Thread:The Reference Desk/@comment-6047958-20151221040616/@comment-188432-20170601033829

I'll grant you that a few notes do play when Chang pops the lid on the fob-watch, but it's only a few. I personally didn't recognise it, even on several replays. Neither the subtitles or the infotext remark upon the tune, and the novelisation doesn't suggest Chang opens the watch at all.