Lacking any meaningful counter evidence (advertisements, catalogs, company records, etc.), the best basis we have for dating the 146 is the chronology of the 149.
Reasons I still think that this pen is from the 1980s:
-I doubt that the use of 14K on the 146 nib would precede its use on the 149 by over five years.
-I have a similar pen found in the wild in a box that has the "Art of Writing" slogan. This began in the mid to late 1980s. Boxes can be easily switched, but no one else has offered anything more substantial as evidence for dating.
-Resin pens with gray ink windows exist with montone 14C nibs. These are the only ones I would feel comfortable dating to the 1970s when the 146 was revived. Here is one for sale on ebay:
http://www.ebay.com/...=item51b8198369
Another thing to note on this one is that the bend of the clip has very little material compared to the one being sold by Tom Westerich at the link below. Clips with more material at the bend are later.
-According to the Barry Gabay article on the 149 in Pen World, the brass threads on the piston started in 1990 (p. 42). The FPN charts shows 1985 as the date for this transition, but there are lots of 149s with two piece barrels and plastic piston threads, so I believe the chart is wrong.
-The Germany vs W Germany designation of the clip is meaningless.
Here is a similar pen being sold on penboard.de that is dated to the 1980s by Tom Westerich:
http://penboard.de/s...blanc 146 61576
Still hoping for a photograph of the feed.
Edited by entertainment, 27 January 2014 - 10:44 PM.