In Colonie Fibre Co. v. National Labor Relations Board, 2 Cir., 163 F.2d 65, which turned upon a provision making the closed-shop agreement effective some eight months before the contract was adopted, only the retroactive provision was held to be void. Thus an unusually drastic penalty is exacted in this case, for the respondent is ordered to cease and desist from giving effect at its Saginaw plants to the contract of May 16, 1946, in its entirety.