Those are standby instruments which can come from different manufacturers and can vary in configuration as the United and Eva Air planes in your photos show. After mergers and equipment upgrades it is not uncommon from what I've seen to have several configurations of standby instruments at the same carrier.
The airspeed is indicated on a separate legacy style round dial on the United panel standby instruments, it is indicated by a tape on the left side of Eva Air standby IFD (integrated flight display). Both panels pictured also have an airspeed tape on the left side of the large PFD (primary flight display).