source: ebay.de wikipedia

Autopsy:

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The collection includes:

• Mattel (Radofin) Aquarius Home Computer System (boxed).
• Mattel (Radofin) Aquarius Mini Expander Module (boxed).
• Mattel (Radofin) Aquarius Game Cartridge Night Stalker (boxed).
• Mattel (Radofin) Aquarius 4k Memory Expansion (boxed).
• Mattel (Radofin) Aquarius Data Recorder (boxed).
• Mattel (Radofin) Aquarius Thermal Printer.

from Wikipedia homepage:

Aquarius is a home computer designed by Radofin and released by Mattel in 1983. It features a Zilog Z80 microprocessor, a rubber chiclet keyboard, 4K of RAM, and a subset of Microsoft BASIC in ROM. It connects to a television set and uses a cassette tape recorder for secondary data storage. A limited number of peripherals, such as a 40-column thermal printer, a 4-color printer/plotter, and a 300 baud modem, were released for the unit.

Looking to compete in the standalone computer market, Mattel Electronics turned to Radofin, the Hong Kong based manufacturer of their Intellivision consoles. Radofin had designed two computer systems. Internally they were known as “Checkers”, and the more sophisticated “Chess”. Mattel contracted for these to become the Aquarius and Aquarius II, respectively. Aquarius was announced in 1982 and finally released in June 1983, at a price of $160.

Production ceased four months later because of poor sales. Mattel paid Radofin to take back the marketing rights, and four other companies—CEZAR Industries, CRIMAC Inc., New Era Incentives, Inc., and Bentley Industries—also marketed the unit and accessories for it. Bentley Industries (of Los Angeles) and New Era Incentives, Inc. (of St. Paul) are still in business, though they no longer have any affiliation with the Aquarius product line.

source: wikipedia