It's on the barrel underneath the forearm piece and on the trigger guard as well.
In the year 1890,as a model No.4 rolling block rifle.
In order to determine the exact value of a Remington Rolling Block rifle, a few different factors would need to be taken into consideration. Some of these things would be the age and condition of the rifle.
Features and markings.
Which model?
Civil War was 1861-65; obviously, the Remington rolling block came out later. Is it a military rifle? What caliber? What condition? All these things affect value. Ranges of rolling blocks are from $550-$4000.
Will have to be made.
fifteen hundred
Not enough information to even hazard a guess.
50-100 USD
The #1 supplier of Remington Rolling Block Parts is www.rollingblockparts.com. The company carries both new production and original parts for most models of rolling block firearms. If you do not see the item you are seeking call Kenn at 530-333-2233. Another source for Sporting Model Rolling Block Parts is Lone Star Rifle Co. in Conroe, TX. This is the only commercial source of both single and double set triggers for the Rolling Block. See www.Lonestarrifle.com or call Dave at 936-856-3363.
Best left to a factory trained gunsmith.