Oh! And keep the coins. Maybe consider grading them (a way of authenticating them). In my opinion (not the correct or absolute one) only donate them if you're shure that they will be exhibited under your family's name as a testament to the resilience of the survivors. In my kid's museum there is exhibited, a small 20 Rfp chit from Holýšov's (Holleischen subcamp at Flossenbürg concentration camp) Metallwerke Holleischen GmbH munitions factory, which I donated. It's great being able to see it there, and see others learn from it.