Identify this Antique Sofa

by Elizabeth
(Monroe, LA, USA)

I inherited this sofa 35 years ago and it was in my family many years prior to that. I had it covered 10 years ago but never knew the style of the sofa. Does anyone recognize the style? The wood on the side is not pine, maybe walnut? It is a sleeper sofa but I don't know if that's original or if it was added later. The sleeper is an innerspring rather than foam like a lot of sleepers today. Any help would be appreciated!