Fine-tune LP-08 sights have micrometer-style adjustments, the little discs (screw-heads) with two holes in them which the adjustment tool engages in order to turn them. The micrometer adjustment was phased out during 1917, apparently as parts stock was exhausted.
Ed, yeah, would have been fun, but 'tis the season. Oh well, there's always another gun show...
--Dwight