You will need a professional appraisal and contact Colt to get a historical letter.
What cost $1 in 1872 would cost $17.77 in 2008.Also, if you were to buy exactly the same products in 2008 and 1872, they would cost you $1 and $0.06respectively.
I believe this gun is an 1872 issue
You will need to call Colt, pay money and hope someone famous owned it.
George Washington Carver in 1872.
Impossible to answer without more details
349
$250
value is based on overall condition.........
because they would have maybe be the most popular business in Australia when it was 1872
40-100 USD
At that time £1 was about $4.86.
value depends on overall condition