Melior was a brand used by the Robar and Sons Company in Belgium. The firm began making a .25 ACP caliber pstol (6.35mm) in about 1912, models changed in 1920, and were made up through WW 2. Unfortunately, there are no public records of production dates, and no ready source of parts. Your best bet will be to check with a gunsmith who MAY be able to make a part for you.
Find a good gunsmith or machinist
A firing pin that is mounted on/in a hammer
Firing Pin Block
Like it says, the firing pin rotates as the action cycles.
What should Firing pin protrusion measure?
By action of the hammer striking the firing pin, forcing it into the primer.
I just got a chrome in almost new condition. It needed a newer firing pin. Not the home maid one. I paid $75. at a gun shop. Don't know if its a good deal or not. He wanted $150. but I asked for a project gun.
Firing pin is what strikes the back end of bullet igniting propellant
You can find a firing pin for the ranger at Numerick Gun Parts Corporation.
Try e-gunparts.com
How to replace a firing pin from a Charles Daly 20-gauge semi automatic
I am looking for a firing pin for a Crescent Firearm I believe the serial # is 8894