I HAVE VERY LITTLE KNOWLEGE ON THESE BUT WILL ADD WHAT LITTLE I CAN UNTIL THOSE WITH MORE KNOWLEGE CAN CONTRIBUTE. I CONSIDER THESE MORE OF A SHORT SWORD( TOO BIG FOR A DAGGER AND TOO SHORT FOR A PROPER SWORD). I WOULD JUST OIL THE BLADE AND PERHAPS THE WOOD AND LEAVE THE COPPER AS IS. THIS IS A NICE EXAMPLE AND THE WORKMANSHIP ON THE BLADE VERY GOOD. THE WOOD HANDLES ARE PLAIN AS USUAL THE COPPER BEING A NICE TOUCH AS WELL AS REINFORCING THE GRIP (SORT OF LIKE HAVING A FERRULE TO KEEP THE WOOD FROM SPLITTING IN THE MIDDLE) WHEN NEW OR UNUSED THESE OFTEN HAVE A BLACK FINISH WHICH IS TYPICAL FOR THESE AFRICAN IRON BLADES SO UNLESS THERE IS THICK ACTIVE BROWN RUST A GOOD OILING SHOULD DO. AS TO AGE NO GUESSES BUT IT LOOKS GOOD TO ME.