well he had to know what time to call the eagles right?!?
Oh yeah of course
Since it was The Two Towers I think he was using it to get the exact time to show up and save everyone at Helms Deep!
Wait a second their are soldiers from Gondor in there, so it's at some point in Return of the King. So the watch MUST be for the Eagle attack!
it was at the battle of helm's deep so he wasent calling any eagles but he still needed to tell the time !
Ha, yeah that's right.