From an article on the Jeton Mueum exhibit.

Whoever hears Museum, thinks more artworks and exhibitions, as in chips.
But for exactly this multi-coloured game Bank currency there is the first museum to visit the over 3,500 tokens in the different versions are now on the Internet.
With some unique collectibles is reminiscent of bygone eras and famous casinos.

The idea was launched by Reinhold Schmitt, founder and editor-in-Chief of the news portal for gambling ISA Guide.
Building on the basis of its own extensive collection of chips and tokens of all kinds, he established the world's first chip Museum.
On a virtual journey through time, starting with the oldest Jeton dating back to 1832, gives visitors a unique insight into the history and development of casinos from all over the world.

Game chips are made of different materials to see here.
In addition to the well-known plastic chips, there are those from Horn, ceramics, mother-of-Pearl, porcelain and even paper.
But also small treasures of gold and silver can be admired.
A special highlight is of course the famous "diamond Jeton" in 1940.
It was issued in the Grand Cercle of Casino Baden Baden, was worth 200 marks and shows a diamond in the middle.

Only the chip can be seen in specially designed anniversary pieces, old special editions and extraordinary rarities at the same time in a collection of Museum for certain occasions.
Some of these chips are Casino Austria already works for themselves, as the chips in the series designed by the painter Friedensreich Hundertwasser.
Others are dedicated to famous personalities like Che Guevara and also pictures of pin-up is so popular in the 1950s not missing girls.
As in a real Museum, the individual images supplemented by detailed explanations about the origin and location and the materials used explains.

Purpose of the whole is to illuminate the cultural background and maintain the versatile history of gambling and the casinos.
At the trade fair for gambling ICE total gaming in London were already selected portions of the collection to be seen and received enthusiastic response.
The beautiful pieces awaken memories and revive the atmosphere in the casinos of earlier times.
He saw them: luxurious salons, where players took out fairytale WINS and devastating losses with the same stoic composure.

But the Jeton Museum is just the beginning.
An extension of the exhibition with other artfully as books, posters, films, photographs, shoe and the equipment of the dealers is planned.
This is enabled by the active help and support of numerous private collectors, casinos and former Casino employee.

Does anyone know what the reference is to the famous "diamond jeton" issued by Grand Cercle of Casino Baden Baden?