When I was looking for this information for the restoration of my
Seeburg F, Art Reblitz referred me to a "forest green" supplied by an
old line manufacturer (this was awhile back, don't remember the name).

I used a "forest green" alcohol soluble dye available from
http://www.woodworker.com/ in Casper, Wyoming.  (They have a large
selection of dyes in water, alcohol, and oil based solvents.)  I used
the alcohol type and mixed it into 2-pound cut yellow shellac.  With
a bit of trial and error I found that it would brush quite nicely with
several coats on new wood, and blend in with the old.

Use a soft natural bristle brush and let coats set up; re-coat until
you have the desired, semitransparent coat of green pigment.  A small
amount of the dye will go a long way so don't add too much to your
shellac to start with-test it on scrap first!

I found that the finish worked quite well when applied to poplar,
needed more coats for some Baltic birch parts, and was a awful on a
temporary part I made from MDF (which I need to replace soon).

Based on how well it blends into the original finish I would recommend
this solution.

Larry Emmons
Tensleep, Wyoming