Once again Dave - Thank You for that information.

There seems to be at least three variations of Ithaca Flues Model frame profiling.

http://img.photobucket.com/albums/v3...4rightfull.jpg

Likewise some have a screw in the top-lever attaching it to the spindle and some have the top-lever and spindle forged in one.

http://img.photobucket.com/albums/v3...rwithscrew.jpg

http://img.photobucket.com/albums/v3...Leversolid.jpg

Kinda like there are two different Parker Bros. hammerless receiver profiles and there are press-fit pins holding the roll and those with the slotted head screw two-piece pin to hold the roll.

Amazing the difference in stylish appearance of the press-pin top lever style versus the screw design. I can hardly stomach those of a Baker - a beautiful gun until you look at that hideous top lever design.