A Tetraminx for the blind produced in the former soviet union, in Rovno, Ukraine.

• Inventor: Aleksandr Ordynets
• Mechanism: Pyraminx
• Patents: Unknown
• Producer: USSR
• Year: Unknown
• Original Price: $0.00 USD
• Current Price: No Data

This puzzle is named "????????", transliterated "Kristall", which means "chrystal".
This one was produced in Rovno (Ukraine).
This is one of several Tetraminxes produced during the soviet era. Unlike the other variants in the museum this one uses tiles which make the variant suitable for blind people.
Images 3-5 proove that not always the same colour was used for the pieces with the same textures.

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