Rule 4532. Self-authentication of newspapers and periodicals of general circulation. Extrinsic evidence of authenticity as a condition precedent to admissibility is not required with respect to printed materials purporting to be newspapers or periodicals of general circulation; provided however, nothing herein shall be deemed to preclude or limit the right of a party to challenge the authenticity of such printed material, by extrinsic evidence or otherwise, prior to admission by the court or to raise the issue of authenticity as an issue of fact.