Partners may, upon or in anticipation of a dissolution of the partnership, agree that none of them will carry on a similar business within a specified county and any county or counties contiguous thereto, or a specified city or town or any part thereof. Provided, that any such agreement which is otherwise lawful but which exceeds the territorial limitations specified by this section may be deemed valid, but only within the county comprising the primary place of the conduct of the business of the subject partnership and within any counties contiguous thereto.
R.L.1910, § 980.