So a alternative to a Colt letter would be letter from an appraiser. Finding the right one for your gun and paying them what is the cost there? Seems some want a percentage of the value they estimate.......
Its either added value and history for you, or worse case when our kids sell it cause they have no interest and want the money.
I'm out in limbo with my model 1862, tried twice with Colt, Beverly and Joe were both great. But when they have nothing I got nothing. Love to spend that $300 to have something.
There is a line there, but its different for all of us.