Description
I found this piece on Internet. It's part of the Elliott Avedon Museum of games. The page states:

The wooden board in the photograph however, was purchased by the Museum from a shop in Copenhagen, Denmark in 1975 where it was manufactured. The board is19.9cm square on top, and is laminated to 20.8cm square board on the bottom. The sides of the board on top slope to the bottom making the board 1.2cm thick. The top has a parquet like surface of 2.5cm squares. The 64 counters are 1.5cm square with light colored wood on one side, laminated to a square of a dark colored wood. Thus the counters can be "reversed" during play of the game. Counters are stored in a suede bag.

Obviously the board is very nice, but there is some doubt about the usability of cubes instead of discs.

Playtime image
Discs material	Wood
Board material	Wood
Year of production	1975
Place where bought	Denmark
Box image
Happy End Graphic Set (click to download and unzip in the Happyend\GraphicSets directory)	Not made yet.
Differences Graphic Set / original board
Usability	/5
Look	/5
Author	Elliott Avedon Museum / Beppi Menozzi