24 to 30gr of FFFg
Either FFFg black powder or Pyrodex P may be used.
Need more information but there is a model 1858 ;) BUT that patent date is on different revolvers as well.
50-165
Remington 1858 cap & ball looks like a navy colt to me
Will probably have to be made. a good gunsmith or machinist should be able to do it.
Depends on condition- anywhere from $100 to $1000. Antiques like these really needs a hands on appraisal
If it's a replica it's clearly market by the manufacturer if however it a forgery they could have stamped it appropriately. So no.
1858 - 2010 = -152
1919 - 1858 = 61
3677
April 4, 1858
1851 to 1858 is +0.378%