It appears most blades were never used!
Making a 15/16th century moulded knife sheath - Sheaths and Leatherwork - Bladesmith's Forum Board
Nice larger X-acto set. I think that most of the tools are present.
Vintage X-Acto Craft Carving Tool Set in Original Wood Box - Not Complete
VINTAGE X-ACTO 3 KNIFE & 13 Blades WOOD CARVING SET IN Fitted WOOD BOX COMPLETE
X-acto X3261 Wood Carving Knife
Precision Hobby Knife Set with 3 Handles and 13 Blades - X-Acto Style
VINTAGE X-ACTO 3 KNIFE & 13 Blades WOOD CARVING SET IN Fitted WOOD BOX COMPLETE
Tools -- The X-acto Knife
X3261 Woodcarving Tools & Precision Knives
X-Acto Woodcarving Knife Knife
Vintage X Acto Knife Set FOR SALE! - PicClick
My first proper little machining project made during my free time in my university's machine shop, a brass x-acto knife handle. Thoughts? I'm stoked with it. : r/Machinists