DO NOT ATTEMPT unitl examined by a competent gunsmith
Impossible to answer without a serial number and detailed description.
This serial number is too high to be the Browning High Power. What model is it? It may be an FN model under brownings patent, but not a Browning arms Co gun. Please be specific about the model and ask again.
cant be answered by lack of description. What model is this?
100-1000+ depending on specifics
9mm Short is another term for the .380 ACP cartridge.
Good answer below. The "9mm Luger" is properly the 9mm Parabellum, but it is also called the Luger. There are about a dozen different cartridges with 9mm in their name, but the 9mm Luger is the best known.
.380 ACP is simply another name for the 9x17 cartridge, also known as the 9mm Short or 9mm Kurz.
380 ACP or 9mm short or 9mm corto
The .380 IS a 9mm- a 9mm Short (also called 9mm Kurz or Corto). There are more than a dozen different 9mm cartridges. Most people mean the 9mm Parabellum (also called 9mm Luger) when they say 9mm. The 9mm Parabellum IS a longer cartridge than the .380 .
War time Hi-Power pistols are a very specialized collecting area. An estimate cannot be done here. A professional appraisal is recommended.
Assuming you're referring to the 9x19mm (also known as the 9mm Parabellum or 9mm Luger) and the .380 ACP (also known as the 9x17mm, 9mm Short, and 9mm Kurz), the answer is no on both counts, and it would be extremely dangerous to try this.
The 9mm Parabellum is longer than the .380 ACP (also called the 9mm Short) They do not interchange.