X-Acto
X-2000(TM) Precision Knife

Blue Handle
Walthers Part # 790-3723, p. 870 Walthers 2012 HO Scale Reference
A scale, $6.69, currently in stock at Walthers

 
This safer stylish knife offers anti-roll design, no-slip grip, center barrel blade release for fast and easy blade changing, greater stability, snap-on safety cap and four colors.