I'm trying to find date of manufacture. L200. Sequential serial #'s

[wild78]

If anyone can help it would be great. I have a set of L200's with sequential serial #'s on the cabinets, 16134, and 16135. I would like to know what year these were built. Thanks

[nedseg]

I don't know about manufacturing date, but I mine are SN 1874x and were purchased from a JBL dealer in April 1974.
I selected my pair from a shipment of 4 or 5 pair that had just arrived, so I know they were reasonably 'freshly' made.
They are 200 "A"s (with LE15Bs).

[DES-1]

http://www.audioheritage.org/vbulletin/showthread.php?24908-JBL-Registry

About Jan 1973?