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Promotional cube for the mainframe computer IBM 4331 from the early 80th.
IBM 4331 was a computer mainframe build from 1979 until September 1984. Memory was 512 kB to 1024 kB RAM. Operating Systems were /OS DOS/VSE, DOS, DOS/VS, OS/VS1. Languages PL/1, RPG II. About 1.3 MIPS. Size of a writing table. Price was about 200.000 US-$, so the costs of promotional cubes could not be a pain. The cube must be from the early 80th.
Each center piece shows the string "IBM 4331". The other pieces of one face shows the same string, but every face covers another string.
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Thank you to the following people for their assistance in helping collect the information on this page: Thomas Lohe.
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