A is accused of fraudulently delivering to another person a counterfeit currency which he knew to be…

Section 12 makes facts showing knowledge relevant, and Explanation 2 to section 12 adds that where a previous offence is relevant under it, the previous conviction is also relevant. Illustration (b) to section 12 declares the earlier conviction for knowingly passing counterfeit currency relevant, so the answer is "Yes, as bearing on A's knowledge that the currency was counterfeit". The rule on bad character after evidence of good character does not limit this, because the conviction is relevant to knowledge.