California cases have long recognized that a contract may, by its express terms, provide for a term of duration of indefinite length and without specific limitation, tied not to the calendar but to the conduct of the contracting parties. For instance, in Great Western etc. v. J.A. Wathen D. Co. (1937) 10 Cal. 2d 442 [74 P.2d 745], our Supreme Court held that "the failure to specifically limit the duration of the contract did not fatally affect it and did not give rise to a right to terminate the contract at will without a liability for damages." (Id. at pp. 446-447.) The court upheld as valid an express term of duration that the contract, apparently a post-Prohibition agreement for the distribution of distilled spirits, remain in effect " 'as long as the plaintiff purchases and continues to purchase from the defendant all of its John A. Wathen Distillery Company warehouse receipts for whiskey . . . .' " (Id. at pp. 444, 447, italics added.) The court cited with approval Noble v. Reid-Avery Co. (1928) 89 Cal. App.. 75, 77-78 [264 P. 341], upholding an express term of duration that a distribution contract continue "as long as" plaintiff-distributor was able to faithfully perform its contract obligations. (Great Western, supra, 10 Cal. 2d at p. 447.)