It may be worth about .10 with heavy wear to around .25 if uncirculated (no wear). You might also try a library for a copy of the Standard Catalog of World Coins for pictures, values and lots more interesting info.
The coins are worth a price ranging from $5 to $15. The prices for the coins will vary depending upon how good of shape the coin is in.
Hong Kong.
Gao Hong was born in 1964.
Neo Kian Hong was born in 1964.
1964
Hong Kong uses its own currency, The Hong Kong Dollar. It is accepted all over Hong Kong, The New Territories and Macau.Hong Kong Dollars
Need to be more specific. 8 types of coins were minted in 1980, and their values vary from a few cents to $900.
Union Bank of Hong Kong was created in 1964.
In circulated condition, it is worth anywhere from 25 cents to $1.25 or so. If it's still uncirculated, the maximum retail value is $6.50.
Ori - 1964 is rated/received certificates of: Hong Kong:III
The Hong Kong Currencey Catalogue 2001 says it is worth $23