We need to see the bolt-rib and the area underneath bolt-handle to tell you what model bolt you have.

FWIW - Later bolt parts fit and function in earlier actions. A later bolt-sleeve & safety-lever can replace your current one.

Show us clear photos, (smaller than 768 KB, will post), of your front and rear sights.

A serial number will allow identifying if your Krag was ever a model 1896 carbine.

Attached; Photos relevant to Bannerman Krag

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