I just "refound" this coin which I had purchased for an unknown price about 10 years ago with no source recorded by me. I have not seen another in this denomination. Allegedly, the proof silver single 1984 10 Dollars coin had a mintage of 67 & the set quite low. This is the 2 Marlins breaching reverse & interesting has a date on reverse and obverse which I had never known the FM to do.
I have never seen the 1984 specimen set, and not even aware of it being advertised at time of issue - I could only afford the pot metal specimen sets at the time. A Russian respondent to another post said he once saw a picture of the 1984 Jamaica specimen set - evidently much like the 1984 Belize set I had posted.