Tkinter: which ttk widget for database table primary key?

[Rich Shepard]

Subject might be confusing so I'll expand it here.

My application uses a database backend in which each table has a unique and
database-generated sequential numeric key. I want to display that key in the
GUI for that class but it's not entered by the user or altered. It seems to
me that the ttk.Entry and ttk.Spinbox widgets are inappropriate. As a
newcomer to Tkinter I ask for advice on which widget to use.

Rich