The following table lists the chronology and
serial numbers of the various SQN mixers.
Model Date Serial Nos.
SQN-3 Type C June 1980 - 1990 3C-1000 onwards
SQN-3 Type M 1980 - 1981 3M-1001 onwards
SQN-3M Series 2000 1981 - 1991 3M-2000 onwards
SQN-3M Series 3000 1991 - 2002 3M-3000 onwards
SQN-3M Series 4000 2002 - 2005 3M-35000 onwards
 
SQN-4S (Series I) June 1985 - Feb 1987 4S-4000 onwards
SQN-4S Series II Feb 1987 - Feb 1993 4S-4400 onwards
SQN-4S Series III Feb 1993 - Oct 1993 4S-43000 onwards
SQN-4S Series IIIa Oct 1993 - March 1997 4S-43100 onwards
SQN-4S Series IV March 1997 - Nov 1999 4S-50000 onwards
SQN-4S Series IVe Nov 1999 - June 2005 4S-51000 onwards
 
SQN-2S June 2002 - Nov 2006 2S-60000 onwards
 
SQN-4S_mini Dec 2006 - current 4SM-61000 onwards
 
SQN-5S Jan 2005 - Dec 2005 5S-55000 onwards
SQN-5S Series II Dec 2005 - current 5S-56000 onwards
Tuesday the 12th of December, 2006