Help with restoring a 1962 Arthur Dixon dulcimer?
Instruments- discuss specific features, luthiers, instrument problems & questions
Wow....That peg box looks like it came up from the ocean floor in an old viking ship....
I think [if it was my project] I'd start by cleaning out those broken pegs and other "stuff" in that box, cutting the strings away first. It almost looks as if the string tension was high enough to snap the pegs {rotten?} off without spitting the box? if it is still sound, clean and replace pegs with re claimed violin pegs, self carved or for "function" , machine tuners...YOUR preference.
The rib crack[s] can be a little tricky, if you only want function, a thin strip of opposing/angled grained wood clamped internally should do the trick. The broken curve on the upper bout is the most challenging, as you need to get it back to the original curve, and reinforce it so it doesn't do it again. Either make a solid piece clamping form using the "good" side as a template, or I have seen using plaster of paris to make a mold of it, making a form perhaps 3-4 inches thick to give something to clamp to.
From what I can see, your top and bottom seem to be intact. Looks like all of it was put together with hide glue, hot water and a 3M pad should clean old glue residue fairly well. Once the old glue is cleaned off of the wood, MY preference is Titebond II, perhaps keeping these repairs from being needed in the next 60+ years...?
Don't know what your "shop" has for tools and clamps and such. Shoot me a message and I can send you some thin stock for cleats and reinforcement....
Best of luck on your upcoming battle.....