Schoolhouse or Brettschule Chairs??

by John
(Brooklyn, NY)

Hi

My grandmother gave me these chairs some years ago. As I remember, we always had these chairs around. Does anyone know what type they are, the value and if worth refinishing? The connecting "spindle" parts are coming loose and a few chairs are showing signs of cracking (lack of humidity - maybe they should be sealed?)

To give another clue, I am from Bucks County, PA.