https://www.answers.com/collecting-hobbies/1964_hong_kong_10_cent_coin_value
1964 hong kong 10 cent coin value? - Answers
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.
10 cent coinhong kong1964valueanswers