Kind of amusing, the verbiage about saving money… suggesting that 2mm wastes lead and time. It’s… 1980? I mean, 0.3, 0.5, 0.7 and even 0.2 mm have been out for decades. Ad seems to be a bit late to the party. 
I was curious to know what TK stands for. Here’s what I found:
In the context of Faber-Castell products, “TK” stands for “Techniker” and “Künstler” , which are German words meaning “technician” and “artist” respectively.