made about 1881
The Colt 1878 frontier model with serial # 35369 was produced around 1896.
According to this proofhouse website http://proofhouse.com/colt/index.html the model 1878 was only made up to 1905 with the final serial number being 51210. I don't know how much your gun is worth but with a serial number 117187 it is not a model 1878
There are no model 1878s. You have a model 1873. Check out www.trapdoorcollector.com for more info.
about 1886
on top, behind the loading gate, next to hammer
If this is the Colt 1878 Frontier model serial # 5100 , then it was produced around 1881.
Your serial number indicates that your Springfield trapdoor model rifle was made in the year 1887.
To determine the date of manufacture for a Springfield rifle from 1878, check the serial number located on the receiver, as Springfield Armory typically stamped it there. Cross-reference the serial number with historical records or reference guides specific to Springfield rifles, which often provide year-by-year production data. Additionally, examine any markings or proof stamps on the rifle that may indicate the production year or model type. If needed, consult with firearms experts or historical collectors for further verification.
if it's the colt single action model, then made about 1884.................................. value depends on overall condition.......................
value depends on the pistol model, overall condition and serial number. If a good early model single action, value could be $1500 - 2500..............................................
the trapdoor model...................
Your trapdoor was made in 1884.