Mikado Block Puzzle
"Made by U.N. Co. N. Y.", circa 1920?, level 1, no holes, notchable, 2x2x8 pieces.
(cardboard box, 3.2 by 2.2 by 5/8 inches, and six 1/2" x 1/2" x 2" wood pieces)
Along wth the
Yamato Block Puzzle,
this puzzle is discussed on page 262 of the
Puzzlers' Tribute Book
in a chapter by Jerry Slocum and Rik van Grol on antique Japanese export puzzles.
They show a picture from the 1915 C. J. Felsman Catalog of a Mikado puzzle saying "A problem of problems ...",
and note that the sililar language here,
"The puzzle of puzzles ...",
is further evidence that although it says NY,
it may in fact be a Japanese import.
Here is what is on the cover and the inside of the cover: