Hi, Just wondering at what point did Tag officially start appearing on watch faces for good. according to the auction here http://www.ebay.ca/itm/171690866836?clk_rvr_id=787780944794&rmvSB=true the case back is marked 980.033 which came out in 1984, yet the face has just the Heuer branding on it. I have seen a 980.013 N from 1982 with the TAG Heuer branding. Can anybody clarify? Thanks in advance.