Uh, that's Benjamin Franklin. $100 bills are call "Bens" only as a matter of slang. I modified your question accordingly.
1959 Franklin halves are pretty common in collections and are mostly worth their silver metal value only, about $6.
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The value of a 1959 Jamaican half penny depends on its condition. Such a coin is worth anything from less than a dollar to about 3 US dollars.
1 cent
Barber, Walking Liberty, Franklin, and 1964 Kennedy halves weigh 12.5 gm and were made of 90% silver, so they contain 11.25 gm of pure silver. To determine the coin's approximate silver melt value, multiply the current price of 1 oz of silver by 0.36.
12% of 1959 = 12% * 1959 = 0.12 * 1959 = 235.08
For the collector value with the exceptions of errors and specially made proof coins, the penny would have to be made before 1959.