What are some cases construing section 151.3(1) of the California Code of Civil Procedure relating to pay for automotive machinists and mechanics?

The first case construing section 151.3, Adams v. Wolff, 84 Cal.App.2d 435, 190 P.2d 665, was brought against the city and county by members of the same local here involved, under similar circumstances. Two issues were raised and resolved in favor of the employees: First, the constitutionality of section 151.3 and second, the refusal of the city to pay its automotive machinists and mechanics, the same rate of pay established by collective bargaining agreements with all private employees of automobile machinists and mechanics with respect to premium pay for night shifts and pay for certain designated holidays.