The final year of the series marked the 5th obverse design modification. New master hubs were made for all denominations in 1909, the IH redesigned with a larger signature "L". It was moved slightly downward and given a slanted bottom right serif.
1909 was also the first year in which the date was included on the master hub and didn't need to be individually stamped onto each working die, ending the MPD era. Date placement is the same on all 1909's as a result.