USA OOB 12 - Unit 599 (Lockheed C-130) has availability date of 1/66 to 12/120.
http://www.af.mil/factsheets/factsheet.asp?fsID=92
C-130A - 219 ordered, first planes entered service 12/1956
C-130B - 134 ordered, first planes entered service 5/59
C-130E - 389 ordered, first planes entered service 8/62
C-130H - 308 ordered, first planes entered service 6/74