Antique American office desk

We have a large office desk with a medium finish that was purchased at an antique store in Denver, Colorado within the last 10 years.  There was no information available about the desk when we purchased it.  The desk includes two pieces:  the main desk with a leather blotter as well as the hutch with multiple drawers.  There are no manufacturer marks or labels on the desk.  We are interested in knowing more about its possible origin and value.