Brooks Brothers Coat Jacket Trench Khaki Mens Sz 42R Large Brookstraveller Beige
See pictures for details and measurements.
Wool liner that is removable
Plaid lining insert is removed.
The "inseam" measurement- 15 inches- is the slit in the back up to the button- which can also unbutton and go up higher.
Notice the pocket on the inside picture- where the plaid lining is supposed to attach to the khaki outer part, but the seam was not fully connected - this can be a quick fix sewing it together.