1970 Accessories folder USA writes "gold finished nameplate and numbers".
It does not provide any other option.
http://i1077.photobucket.com/albums/...ps49000404.jpg
http://i1077.photobucket.com/albums/...ps60847c36.jpg
1971 "Verkaufsprogramm für 1971" RoW lists the "Komfort option M470" for 911T (also in its 1970 version).
It does not provide any other option for number and name plates. It shows a green gold plated 911T on its cover.
http://i1077.photobucket.com/albums/...pscefc2ce0.jpg
http://i1077.photobucket.com/albums/...ps2899f5f5.jpg
1971 Accessories folder shows a silver plated 911T.
(btw some people think its a 1972 item because Miller wrote it but its wrong, the 72 is w black cover.)
http://i1077.photobucket.com/albums/...ps84343955.jpg
http://i1077.photobucket.com/albums/...ps2868496d.jpg