Johnson City Puzzle

Southern Toy Co. for Long Sales Co., Johnson City, TN, circa 1930's?
(wood box that looks like a book and 7 wood pieces, 8.5" x 6" x 5/8")

Exchange the dark and light pieces; here are selected positions of a not minimal 42 rectilinear moves solution (59 straight-line moves):

Johnson City Solutions
Starting with move 15 of the solution of the previous page (step 5 of the selected steps shown), here are different additional steps that can be taken to achieve a 39 rectilinear moves solution:

Here is the full 39 moves rectilinear move solution (59 straight-line moves):

Here is a 58 straight-line moves solution (41 rectilinear moves):