Requires professional appraisal
is that 1948 or 1848 ..............??? if 1848, barrel is about 8"
Try here http://proofhouse.com/colt/
Yes, as long as the barrel is longer then 4 inches.
Your weapon would take the 38 special. Be careful with the older Colt Double Action Revolvers. If the barrel indicates 38 "Special" - only then would it take that cartridge. Typically if the barrel states 38 New Police the revolver with take the 38 S&W ammunition, either short or long depending on the length of the cylinder (Colt could not bring themselves to roll stamp S&W on their revolvers. When the barrel shows just "38" this would indicate the 38 Colt Round, either short or long - again depending on the length of the cylinder.
50-1000 depending on specifics
Your best bet is to get it lettered by Colt.
check the auction sites.
Your question is to vague. What do you mean by "long range? Depenidng on that answer, barrel length could be from 24 inches on up.
Around $600, depending on model and condition.
'The Hand of God' - A reproduction Colt Peacemaker with a 4 3/4" barrel made by U.S. Fire Arms in caliber .45 Long Colt was the revolver used by Russell Crowe in the movie.
It's a revolver made by Taurus. It is available in 2 1/2 or 3 inch cylinders and a couple of different barrel lengths. It will fire a .410 shotgun shell or a .45 Colt (commonly call ".45 Long Colt")
Value will depend on exact configuration, overall condition, finish, box, manual, accessories, serial number, barrel length, etc.. Range could be from 25 USD to multiple thousands of USD.