just picked up a nice condition 70's kodiak hunter.  The bow has a sight one it, back of the riser and lower limb small screw holes,  you know the deal.  What is the best way or material to use to fill and seal these tiny holes up?

Super Glue mixed with saw dust, That's about one of the best ways to fill them. Others with more experience will chime in soon to tell You better.

Lots of good advice in this thread.  I used epoxy putty and tamped it down into the hole with the flat end of a drill bit that fit.

RonP

  fixing a hole

There are sure some talented guys here that can hide holes well, but........ I've never seen a repair that, well looks unnoticeable. I've tried everything and finally came to the conclusion to hide the holes rather than try to make them disappear.  By this I mean cover the holes with something like a bead or stone or even a couple of small flintknapped arrowheads that I inset into the limb to hide the hole.  Just something to think about, making it look like it was on purpose instead of a repair.

If the hole isn't too small, you may get a plug-cutter bit the size you need to plug the hole. It cuts out dowel plugs. The advantage of using one is so you can cut out from the face grain, not like end grain in a dowel. Find a wood of similar grain, color and texture, cut the plug and glue in. Be sure to align the plug's grain with the bow's grain. Then sand, stain and seal accordingly.

Obviously more involved with this method. Even with this procedure, you may still see the circle outline of the hole, but not nearly as much.

A guy I know melts crayons into smaller holes, matching color to wood tone or glass color.
I'm a super glue guy myself, then hand paint over that.

I think the plug cutter method is about as good as you can do. be careful of the glue you use or you will see a dark ring around the plug

I take it these are in the glass. Then I chamfer the hole edges with a drill bit, fill with a carved piece of wood and epoxy below surface, let dry. Then I mix epoxy with mixed paint to approximated your glass color and dab that on top of the filled holes and make sure you mound them up a litte as they shrink. Let dry good and dress down with wet/dry sandpaper in increasingly fine grit and finish with TruOil. Should be almost invisible.

Two holes filled here. Lighting does funny things but these are almost invisible in the hand.