Corporation not having seal.

If the corporation has not adopted a corporate seal, such fact may but need not be stated in such written instrument. [S13, §3068; C24, 27, 31, 35, 39, § 10068; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §558.3 ] 96 Acts, ch 1154, §2