Columbia Model 50 - Need Help On Year Built?

[Capacharry]

I have a Columbia Model 50.
Pretty decent shape.
SN is either 10511 or 10611.
Any idea on the year that it was built?

Harry

 

[rustjunkie]

Looks like 1898?

http://www.vintagecolumbiabikes.com/id79.html

 

[1898Columbia]

There are some good threads here on dating the Columbia Model 50 so if you do a search you might find the answer. I have an 1898 but I don't know enough to tell you all the points that make it different from 1899 and later models.