There are at least two people in the U.S. who specialize in bird box
repair, Moe Goldy <mgoldy@earthlink.net.geentroep> and Ray Lins
<r.lins@att.net.geentroep>.  [Remove ".geentroep" to reply.]

Joerg Wendel, son of Siegfried Wendel, preserves a lot of the old
Griesbaum technology and can still furnish parts for Griesbaum bird
boxes.  His web site is at  http://www.musicboxworld.de/

Matthew Caulfield (Irondequoit, N.Y.)

P.S. With an insane email address like George Watson has, I can't be
sure of reaching him, because my computer typeface doesn't distinguish
between a lower-case L and a capital i.  And I thought the old
Compuserve email addresses were bad!

 [ Use copy-and-paste to avoid typing errors.  ;-)  -- Robbie