After a power outage, my microwave clock tells me, one word at a time, to "PRESS CLEAR THEN PRESS TWO TO SET CLOCK". So I took a picture of the clock saying "clock", because I'm all into self-reference. But then I thought: Is it really self-referential?
I figure: At the time it's displaying this message to me, it's not acting as a clock. If it's not a clock while it's displaying the word "clock", then it's not self-referential, after all, right?
On the other hand, if you had a digital watch that displayed some message, you'd still think of it as a watch. So, from that perspective, it's still a clock that's just temporarily displaying a message, in which case it IS self-referential.
But then again, this is a microwave, and the display's primary use is as a timer, not a clock (subtle difference). So maybe it really IS only a clock when it's acting like one.
So yeah, I can't decide whether this photo is self-referential or not. :P