Im not sure if this is the right sub, but I'll try.
My girlfriend lives in a house once owned by Germans, back when it was the sudatenland. They have this Piano which has been in the house before them, they say it was made before the first Czech Republic.
I did some digging on the names, a wikipedia of "Žatec" in German which linked to the "Jews in Saas" of the article.
Can anyone get anymore information?
Thanks!
Like Zikzax says, if it's circa 1900, it's not likely worth much, because it is likely soon to need a complete rebuild. For pianos that have not been in someplace very dry like Arizona, the lifespan is about 100 years. The felts on the hammers, the felt dampers, the felt bushings around the keys...all these are likely to be very worn, eaten by moths, or both. If it's a grand piano, it may be worth restoring. But if it is an upright, probably not.