Rule 4539. Reproductions of original. (a) If any business, institution, or member of a profession or calling, in the regular course of business or activity has made, kept or recorded any writing, entry, print or representation and in the regular course of business has recorded, copied, or reproduced it by any process, including reproduction, which accurately reproduces or forms a durable medium for reproducing the original, such reproduction, when satisfactorily identified, is as admissible in evidence as the original, whether the original is in existence or not, and an enlargement or facsimile of such reproduction is admissible in evidence if the original reproduction is in existence and available for inspection under direction of the court. The introduction of a reproduction does not preclude admission of the original. (b) A reproduction created by any process which stores an image of any writing, entry, print or representation and which does not permit additions, deletions, or changes without leaving a record of such additions, deletions, or changes, when authenticated by competent testimony or affidavit which shall include the manner or method by which tampering or degradation of the reproduction is prevented, shall be as admissible in evidence as the original.