Hello and welcome to the forum!
F on German coin stands for Stuttgart, it's pretty common, over 18 mil. pieces were struck there in 1967.
The 50 cent(avos) are is from Mexico, not Singapore.
All three coins are pretty common and are not that valuable.
F on German coin stands for Stuttgart, it's pretty common, over 18 mil. pieces were struck there in 1967.
The 50 cent(avos) are is from Mexico, not Singapore.
All three coins are pretty common and are not that valuable.





















