A Mia Culpa. I misrepresented my 16 ga. Dickson as a Bar-In-Wood. It's really an Island Lock. The term Bar-In-Wood is a little fluid, and seems to refer to any extension of the stock wood to cover some of the the action metal. So in a sense the Island Lock could be considered a variant of a Bar-In-Wood action, although it does have its own firm designation. No matter what, I think that the McNaughton style of Bar-In-Wood is the prettiest of all. Douglas Tate discusses the variants.
https://shootingsportsman.com/skeletals-in-the-closet/