Swiss Army Celtic Classic SD Limited Edition The Celtic Classic SD Limited Edition Swiss Army Knife by Victorinox is a Swiss Knife Shop exclusive showcasing a beautiful shamrock design - sure to please those who are Irish or even Irish at heart! Great knife to give to show your love! Beyond its unique design, the Celtic Classic SD is also an excellent and unique key holder. This miniature tool is small enough to fit in any pocket, glove compartment, handbag - anywhere. Add this iconic, original, Swiss-made multi-tool by the makers of the