need help determining what date format this is

I have a file that I'm going to be picking up nightly via SFTP. The file has a naming convention that uses a date in the name. Example MyDbDump-2011-01-01_00432开发者_C百科4.sql.gz

The part I don't understand is the last part _004324. Any idea on how that is generated? The host machine is a Red Hat box.

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It looks like a timestamp: 00h 43m 24s