No.The only model 1891 that I am aware of was made by the Marlin firearms Company.
Your Winchester model 1873,was made by Winchester in 1891.
1891 is the answer to your question as to the date of your model 1886 Winchester
With the serial number that you have provided,your winchester model 1873 rifle was produced in the year 1891.
Your serial number indicates that your Winchester model 1886 lever action rifle was made in the year 1891.
Winchester did not make a Model 30
Winchester did not make a model 81.
Winchester did not make a Model 1882.
Winchester did not make a model 96 shotgun,they did make a model 97 shotgun however.
Yes they did.The sears model number was model 54.This was a Winchester model 94.
Winchester made the model 1873 rifle and the model 1876 rifle,but did not make a model 1875 rifle.
You are describing something that Winchester did not make.
You have no question. Yes, Winchester did make them.