That is a very nice chair. Do you know anything about the history of it like who owned it or what house it was in in the 1870's if you can document who has owned it and it lineage it increases the value. my guess is it was done by a highly skilled craftsmen and you might be able to find out who that was by following its history. Also do not get it repaired yet as that could decrease the value if it is an important piece. good luck in finding out would love to know what you find out.