The sigma D M 3 guitar i have was made in korea for c.f.martin co. and the serial number is 258440 with extra set of martin made strings and original case and every thing in cluding case is MINT condition. Near as i understand was made about 1970 but not sure. Any one interested in buying it contact me thru my email addy..............paintmanzart@webtv.net........thanks bob bruce