One click search of Waterford 1200 brought up this link. 1999 Waterford 1200/Ultegra - BikePedia which says the 1999 version used a 1" headset, and by inference, fork with frame built around this spec. While not a guaranty of what the OP has a pretty easy thing to do.

One more example of too little info early on creating a lengthy thread. Andy.