for the 25 oldest HP calculators!

Hewlett-Packard Singapore organised this contest in conjunction with Hewlett-Packard’s 15th anniversary in Singapore.

The Straits Times, 21 January 1985, Page 10

And the results:

On 5 March 1985, a director of National Computer Board, Mr Sushil Chatterji, received two prizes for being the owner of two of HP’s earlier model of the Hewlett-Packard Calculator. A total of twenty-two people had submitted their calculators for this contest.