How do you get a replacement key for a rethyo watch its a name of a certain pocket watch that winds with a separate key?

To get a replacement key for a Rethyo pocket watch, you can start by contacting the manufacturer or an authorized dealer for assistance, as they may offer replacement parts. Alternatively, you can visit a local watchmaker or jeweler who specializes in vintage or mechanical watches; they might be able to create a duplicate key. If you have the original key's measurements, searching online marketplaces or watch parts suppliers may also yield results.