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See current time up to the second here>>https://www.timeanddate.com/worldclock/usa/los-angeles

In addition to the new high-end Prospex Marinemaster, Seiko announced two more 60th-anniversary models that are variations of popular Prospex dive watches. The link first is the SPB509, a GMT version of the 1968 link Diver's Modern link Re-interpretation.

Dont worry its not a fake but rather Seiko catching up with the latest changes to ISO link 6425 one of the most widely accepted standards link in place for dive watches. The most recent update to the standard was established in 2018 and article 4.2.2 includes for analog displays the markings indicating every 5 min meaning the earliest iterations of the SPB143 along with several other Seiko models are not up to link the current ISO standards for a dive watch.