Small format scarves were certainly done in the 1950s , they are rare. Lots of pochettes were sold in the 1960s - 1970s.
Then in 1986 (I wrote 1990 ca previously), the gavroche line was introduced (per a long forgotten blurb from Hermes !) with a great flourish, as if they were introducing a novel size of scarf. They started doing more elaborate feminine designs- that was new, but the size had been done before. Some people make a distinction between pochettes & gavroches, others do not, but they are basically the same size. So, the (supposedly) new product - gavroche - was in an old size, with more feminine designs - some old & some new, in different fabrics eg mousse, but not jacquard. I seem to remember one or two 45 cm cashmeres, but, I may be incorrect.
Sorry, that is the brief version, could go on for paragraphs .. there are no fast rules for hermes scarves, there are too many exceptions...
The 1986 intro of the garvoches was like the 2007 intro of the 70s - H had done 70 cm scarves before, but presented the smaller 70 format as if it were a new idea, which it was not. The «vintage» fabric was new but not size. So, many think the 70 cm size was invented in 2007 which is incorrect.
Carres d Art is very good, given the limitations of the format.
It only has a one liner of information for each design. Compare to my run-on explanation of gavroches with in all sorts of caveats about size, fabric etc. To me, it is inexact to say the gavroche was invented in 1986, but that is the one date that people hang on to. I am one of those people for whom excapsulating an Hermes design in a one liner is an anathema
I gave it to my son, but I can try 
