I think I have the 1898 sight.  My serial number is 195044, which I think is 1899 production.   Top of my sight ladder is broken off, so I had the slide but not the top--which I have ordered.  This will be a shooter, but complete and with a much better than average stock, based on other milsurp rifles I have of roughly the same vintage.  Appreciate the input and any additional would be welcomed.  I'd add more than one picture if I was computer savvy enough to do so.

EDIT:  Got my sight together.  Only thing lacking is the pin that goes through the adjuster knob.  I suspect almost any wire of the appropriate size would work--I got as low as a 16 Gauge brad, but still was too large--any suggestions here?