The gentleman I bought the 1884 from had a 1878 he wanted 650.00 for so I looked at it. I passed but Since l know just enough to be dangerous wanted to confirm thoughts

Had good bore. Bluing 30%ish and had surface rust at one time. No stock cartouches but if it was sanded it was a long time ago and lighly done. Buffington sight no cleaning rod grove trigger. I thought serial number was in 300,000 range.

So Buffington sight means barrel off later gun correct?
Grove trigger could be correct if it was built in 1883 or after?
I'm thinging serial number was actually 200,000 range as300,000 would be 1885 so 1878 receiver stamp would not fit

Did armory rebuilt trapdoors get any special stamps like 1903,s. If it was an armory rebuild how does one tell