http://www.varietyvista.com does not list an RPM for the 1974-S cent. I would sooner think your coin has die chips at the mint mark.
There is no doubt it is a MMS-009 VS the only other MM used which is the 008. http://varietyvista.com/01b LC Doubled Dies Vol 2/Mintmark Styles/1952SMMS008b 1c.jpg