My old Chairs

I have four of these chairs and the have been in my mom's attic for well over 30 years . The chair height at it's back peak is 38 inches . The seat is 18 inches off the gound and seat width is 17 inches . The chair is very heavy and seems to be solid oak . I have checked all four for any type of markings to help identify them but can't locate anything . The four screws under the seat are straight head . Thanks for any help .