1955 South African half penny proof or not?

Im trying to figure out if these are proof coins or not and maybe a value on one? Any knowledge is greatly appreciated.

 

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Mintage of the 55 1/2 penny was 3,774,000 and 2850 KM 45 prices seem to be all over the map.
If a proof say 62/ 63 I see some real value if a mint strike the values seem to be under a dollar depending on condition.
Back around 2008-10 I has some real sweet SA coins. Mint and proof sets that included the 1 and 2 rand gold coins.
I parted with them to a former Rhodesian /S.A. person who had left S.A. and lived in Canada.
At one time a thought to be good friend....turned out to be just the opposite.

 

Judging by the halo around the lettering, I think they're polished business strikes.

 

Thank you for your knowledge. I have a few of them "like 30" even a couple with errors. Not sure what to do with them.

 

Here is one of those errors.