Bogata Colombia Mintmark

I picked up a 1943 Colombia 5 centavos coin and looked for the mintmark. Krause says "some coins of 1942-1956 have weak "B" mint mark." There are two varieties of the 1943 5 centavos - one with a mint mark and one without the mint mark. Where should I be looking for the mintmark if the coin has one? Thanks.
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Comments
Under "V" (denomination Roman 5 letter).
Thank you.