New old stock vintage winter work pants, cotton flannel lined denim blue jeans

Lot of four pairs of vintage cotton denim blue jeans with flannel lining, heavy duty winter gear for ranchers, farmers etc.. These have never been worn, they're vintage surplus or factory seconds, I think.

The size is the same on all four here, garment measurements of 36-37" at the waist, 31" at the inseam uncuffed. The flannels are a couple of different plaids, which is nice!