I know this thread is almost two years old, but I wanted to post to add information...
Some threads mention the Victorinox and ISC scales possibly being interchangeable; this is not the case. The ISC uses the solid scales like the older Victorinox scales, yes. However, the Victorinox has two large pins (one on each side) and one smaller pin in the center. The holes in the scales are drilled for these sizes. The ISC, however, uses three large pins, and as such, three large holes in the scales. The Victorinox scales won't fit the ISC frame unless you make the center hole larger. Also, the center holes are off my about 2mm, thus, no fit.