On top of barrel on left side at receiver with large VP . Based on the serial number, its likely this started out its life as a Model 1879 and like many trapdoors was upgraded to the Model 1884 by additions of the .
Dimensions: 4.5 x 51 x 2 in Condition Report: Good. Original case of ten 10 model 1884 trapdoor springfield rifles, 45 70.
I have a springfield 45 70 trapdoor carbine, serial number 10404, model 18. Composite rifle: early 1873 lock plate, second style 1873 breach block, 1884 . SPRINGFIELD 'TRAPDOOR' RIFLE - Serial number 374812. The model 1884 did not come in serial number 80835, the beginning numbers are 280001 for the rifle, carbine and cadet rifle.
