Are there 4 chairs total in different styles? Pics are very dark so can`t see detail well. If you can get them in better light I could tell more. Does the last one have an applique or is it an inlay ?? Offhand and just from what I can see, looks like the chairs are from the 20`s or 30`s , Perhaps a bit earlier but can`t see enough to be sure !! And are odd side chairs that possibly went with a dining table at one time. Did your grandmother just sort of collect them,, someone had an extra chair they didn`t need or couldn`t use so they gave them to her? Or were they part of sets that she once had ??