I would say the year of Manufacture is about 1890 or 91
I have an 1884 Ser.#54689 It was made in June of 1892
With the serial number that you provided,your Springfield Trapdoor Model was made in the year 1884.
With the serial number that you provided,your Springfield model trapdoor rifle was made by Springfield armory in 1883.
Your serial number indicates that your Springfield trapdoor model rifle was made in the year 1887.
Your springfield model 1873 trapdoor was made at springfield armory in the year 1883.
With the serial number that you provided,your Springfield model 1873 trapdoor model rifle was produced in the year 1875.
With the serial number that you supplied,your Springfield model 1873 Trapdoor rifle was made in the year 1884.
With the serial number that you provided,your Springfield model 1873 Trapdoor Carbine was produced in the year 1877.
Your serial number indicates that your Springfield model 1884 rifle was made in the year 1888.
made in 1875
the model 1884 trapdoor is going for 525-1,400 depending on condition of the rifle.
Your trapdoor 45/70 was made in 1880.
made 1876