Bob - I am reluctant to say never. But, that scenario is probably unlikely.

The model 1898 sight was rather short lived. It was designed for a 'hotter' .30-40 cartridge, that propelled the 220 grain projectile at 2,200 fps.

After a brief period, it was found that Krag Bolt-Lugs were cracking. There was a return to the 2,000 fps round. The 'hotter' ammo was scraped and the model 1898 rear-sight became surplus.

Because, Springfield reused the top part of the 1898 sight, complete model 1898 sights are a bit hard to find.
The bottom bases used to be real common. Dealers, like Bannerman's and Stokes Kirk, bought up surplus parts and assembled sale-able guns.

This makes for a lot of head scratching with Krags.