Your trapdoor was made in 1884.
Your serial number indicates that your Springfield trapdoor model rifle was made in the year 1887.
about 1886
on top, behind the loading gate, next to hammer
There are no model 1878s. You have a model 1873. Check out www.trapdoorcollector.com for more info.
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.
made in 1887. caliber 45/70. vlue depends on overall condition. anywhere from $300 - $900 +
The value of an 1878 Springfield rifle with the serial number 219291 can vary widely based on its condition, completeness, and historical significance. Generally, prices for such rifles can range from a few hundred to several thousand dollars. To determine a more precise value, it's important to consult current gun auction sites, collectors, or appraisers who specialize in antique firearms. Factors such as original parts, markings, and any historical context also play a significant role in its valuation.
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
With the hammer in the full down position look just to the left of where the hammer rests against the firing pin. You may need to open the action to read the entire number as it may obscure the last digit(s).
Late 1878
about 1878
if it is the 1878 hammer shotgun made about 1886