My IF had an 853 main triangle with Columbus Nivacrom rear triangle I seem to recall..
From the IF site..
The steel Deluxe was our first model, introduced in 1996. Initially the frame was made with True Temper, 1" headset and straight stays. It has been constantly improved over the years. The head tube was changed to 1.125" in 1997 at the same time that we adopted Reynolds 853 for the main triangle.
More recently, we were able to lighten the frame by adopting Columbus custom Nivacrom S-bend chain stays and Columbus custom Nivacrom S-bend seat stays. It has received critical acclaim from the bike press and our riders in each of its iterations.
I know I keep posting this photo, but I miss it so much it pains me