You might post some more pictures of the rear sight, hand guard, and stock. Members here can give you insight as to the history what if any of the parts are untouched and have a high collector value.

We all get old and scopes give us a chance to hunt longer. You may appreciate having a scope in the future if you hunt. Right now plugging the holes with screws that could be easily removed may improve the eye appeal.

If you have a bunch of high value parts on this carbine, a marriage of yours with another 1899 with a broken stock could be a happy affair.