Recently 'John M11' asked in the 'Modified Krag Section' about scope-mounts that used the Krag side-plate. He has a model 1898 Krag that was 'sporterized' and has two widely spaced tapped holes in its side-plate.

When I responded on his thread, I could not recall any scope-mount that used the side-plate. I ran across reference to one, yesterday, I had forgotten about.

In 1901, seven Model 1898 Krags had the Cataract telescopic sight installed for field trials. The rigs apparently performed well, but, were not pursued further.

(Note: The spacing of the holes on 'John M11's side-plate is more extreme than the Cataract mounting system).

I think that would be a fun project and would only require altering a side plate and barrel band. It would probably be more comfortable if you shoot right handed, but, could sight with your left-eye.

I would love to study one of these mounts. It appears the front ring pivoted on the barrel-band and that the rear ring could quickly be adjusted for different target distances.

Just the rig for 'Vintage Sniper Matches' !

Oh this is cool. Someone, can't remember who or on what board, mentioned that the side plate was fairly thin and probably wouldn't provide enough threads for a secure hold. I wonder if that experiment used a modified side plate or if the mounting to the barrel band provided enough stability? 

Being the sight/scope set up wasn't ever issued, only an experiment, would it be allowed in the vintage sniper  competition ? I remember that there was some wording in the rules that was a general description of what was allowed. But mostly I remember that specific rifle/scope combinations were allowed.

Mine could be brought back to military configuration. I can't imagine the cost of doing so though.

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Just adding what i can find. 

I'm trying to find something on the Caaract scope 

Were it me I would solder the scope base to a side plate and not risk the screw threads being too shallow. Use a separate plate from the one that's original to the rifle, too, for posterity reasons.