Brand or date of of little consequence, unless you are interested in finding out the remote chance it is a valuable antique.

Refinishing has a few steps, but to explain them will take a lot.
- Remove hardware. Separate parts if done easily (e.g., unbolting)
- Strip using a chemical stripper. Do not be tempted to "sand off the old finish." The latter is time consuming, risks damage, and does an incomplete job of removing the finish and color. Let dry.
- Lightly sand
- Apply stain, if desired.
- Apply finish of choice.

Here is a link that might be useful: see if you can find this book at your library