for the asserted violation of sections 1 and 2 of the Sherman Act, 15 U.S.C. §§ 1 and 2. According to the complaint, the alleged violation consisted of Union Oil’s retail price control of the gasoline sold by plaintiffs.1
Ten additional gasoline service station dealers engaged in selling Union Oil products were eventually permitted to intervene for the purpose of asserting similar claims. The original plaintiffs and the ten intervenors will be referred to herein as plaintiffs. During the period in question all of them did business in the Northern District of California, where this action was brought. Their single damage claims against Union Oil aggregate $117,900, but they ask that this amount be trebled to $353,700.
By way of a second claim in the complaint and amended complaints, supplemented by an independent motion, plaintiffs also sought to establish a class action under Fed.R.Civ.P. 23. In this connection plaintiffs asserted that they represent a class consisting of all independent Union Oil retail service station operators in seven or eight western states who did business under Union Oil consignment agreements or retail dealer storage and purchase agreements during the four years preceding the filing of the complaint herein. Defendants estimate that a maximum of three thousand dealers would be brought in to the litigation if a class action were permitted. Plaintiffs allege that the single damage claims of these additional dealers would aggregate $34,800,000, trebled to $104,-400,000.
The district court denied plaintiffs’ motion to declare a class action. In so ruling, the court held that plaintiffs failed to establish the prerequisites of paragraphs (2), (3) and (4) of Rule 23(a), and failed to meet the conditions set forth in Rule 23(b) (3).2 Plaintiffs requested the district court to certify the case for an interlocutory appeal to this court, pursuant to 28 U.S.C. § 1292(b). The district court refused to certify, whereupon plaintiffs took this appeal, purportedly under 28 U.S.C. § 1291 (final decisions), from the order denying the motion to declare a class action.
Union Oil argues that plaintiffs may not prosecute this appeal because the order in question is not a final decision within the meaning of 28 U.S.C. § 1291.
Perhaps it would be sufficient to cite Rogers v. Alaska Steamship Co., 249 F.2d 646, 649 (9th Cir. 1957), which appears to support Union Oil’s contention. However, when that case was decided, amended Rule 23 of the Federal Rules of Civil Procedure, effective July 1, 1966, had not been adopted, and plaintiffs’ contentions are based upon that rule. Consequently, we do not think that our decision in Rogers is controlling here.
A “final decision” generally is one which ends the litigation on the merits and leaves nothing for the court to do but execute the judgment. Catlin v. United States, 324 U.S. 229, 233, 65 S.Ct. 631, 89 L.Ed. 911 (1945). But in order for a decision to be “final” within the meaning of section 1291, it is not necessary that it be the last order possible to be made in the case. Gillespie v. United States Steel Corp., 379 U.S. 148,
1
Plaintiffs challenge the legality of Union Oil’s consignment agreements with retail dealers, which were also involved in Simpson v. Union Oil Co., *877 U.S. 13, 84 S.Ct. 1051, 12 L.Ed.2d 98 (1964), clarified in 396 U.S. 13, 90 S.Ct. 30, 24 L.Ed.2d 13 (1969), and its “Retail Dealer Storage and Purchase Agreements” and “Retail Dealer Gasoline Purchase Contracts,” which were utilized after the first Simpson* decision.
2
In reference to Fed.R.Civ.P. 23(b) (3), the district court stated that it was: