Table:
text: Yankee-class submarine
Units
Yankee class — significant dates
_ Project Shipyard Laid_down Launched Commissioned Status_
K-207 667A SEVMASH, Severodvinsk November 4, 1966 September 20, 1968 May 30, 1968 Decommissioned May 30, 1989 for scrapping
K-210 667A SEVMASH, Severodvinsk December 16, 1966 December 29, 1968 August 6, 1969 Decommissioned July 17, 1988 for scrapping
K-249 667A SEVMASH, Severodvinsk March 18, 1967 March 30, 1969 September 27, 1969 Decommissioned July 17, 1988 for scrapping
K-253 667A, 667AT SEVMASH, Severodvinsk June 26, 1967 June 5, 1969 November 28, 1969 Decommissioned for scrapping
K-395 667A, 667AT SEVMASH, Severodvinsk September 8, 1967 July 28, 1969 December 5, 1969 Decommissioned for scrapping
K-339 667A Leninskiy Komsomol Shipyard, Komsomolsk February 23, 1968 June 23, 1969 December 24, 1969 Decommissioned April 19, 1990 for scrapping

Question: Which project was originally launched before September 20, 1968 among the Yankee-class submarines?

Question: When was the first launch date actually starting August 6, 1969 for Yankee class submarines?