This is the range of buttonhole cutters I have currently
L-R
Hyde Mfg - Domestic - Chisel with interchangeable blades,
D.G. Chase Domestic - Sliding Blade,
C.W. Benson - Domestic - Adjustable Buttonhole Scissors,
D.G. Chase - Tailor/Seamstress - Adjustable buttonhole cutter (missing edge guide),
Wiss and Sons - Professional - Adjustable buttonhole cutter with keyhole and without and edge guide.