'King carp' - A 'late type' of model 1896 carbine sight is what the model 1898 carbines were originally issued with.

A 'high hump' on the sight-leaf (at the pivot) is a feature of early model 1896 sights, (rifle and carbine). This feature was short lived (1895 - IIRC) and maybe it was a carry-over from the model 1892 sight-leaf(?).

IMHO - A 'high-hump' model 1896 carbine sight would not be correct on a model 1898 Krag carbine.

Note - Model 1896 sights display an evolution. There are several variations in number & scale placement, as well as, knob size.

(Poyer's book is a bit helpful on this stuff, but, I don't think he covered the 'high-hump' variation. 'Parashooters' photo is a wonderful example)!

1. & 2. A model 1898 carbine probably had this sight, when issued.

3. 'High-hump' sight off early carbine (1895). 4. model 1892 sight

---