9-412. Exemplar. Whenever the genuineness of a writing is at issue, any writing admitted or proved to be genuine is competent evidence as an exemplar for the purpose of comparison with the disputed writing: provided, that such writing so admitted or proved to be genuine shall in no way refer or relate to any matter then in issue.
[(9-412) R.C., sec. 6000, as added by 1915, ch. 154, sec. 1, p. 335; reen. C.L., sec. 6000; C.S., sec. 7971; I.C.A., sec. 16-412.]