Thanks for reply on spec John. Good to hear it's the 2014 on version when multiple changes were made. Difficult to confirm specific month of production but have a look at
this latest post on registry thread which maintains a list of TM'ers new M3W's against chassis and VIN number, although it's not consistent after first year or two of production. Chassis number is stamped onto frame that supports right hand seat squab BTW.
FWIW I ordered my new M3W very late 2015 and took delivery April 2016. AFAIA the availability of special edition models had ceased by then hence my comments.