1762 "Black square" wooden puzzle (Q4107)
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1762 "Black square" wooden puzzle, designed and made by Vladimir Krashnoukhov (with a handwritten letter next to it)
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | 1762 "Black square" wooden puzzle |
1762 "Black square" wooden puzzle, designed and made by Vladimir Krashnoukhov (with a handwritten letter next to it) |