Section 155: Presumption as to handwriting, etc. in documents twenty years old.

Where any document purporting or proved to be 20 years old or more is produced from any custody which the court in the particular case considers proper, the court may presume that the signature and every other part of such document which purports to be in the handwriting of any particular person is in that person's handwriting, and in the case of a document executed or attested, that it was duly executed and attested by the persons by whom it purports to be executed and attested.