Jamaican coin

[kickstart]

I found a 1989 20 cent Jamaican coin in the hopper of a coinstar machine. I know they stopped
minting them that year but thats all. Silver coin?

 

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[Mackaydon]

On January 30, 1968, the Jamaican House of Representatives voted to decimalize the currency, introducing a new dollar worth 10s, and divided into 100 cents (1 cent thus being equal to 1.2d). At the time, coins of 1 cent (1.2d), 5 cents (6d), 10 cents (1s), 20 cents (2s) and 25 cents (2s6d) were produced and banknotes of 50 cents (5s), $1 (10s), $2 (£1), and $10 (£5). These coins and banknotes went into circulation on September 8, 1969.
Source: Wikipedia