To date the Victorinox economy or eco line knives is more demanding than the regular Officiers knives. So I will talk on how you may judge the emblem in the handle.
The knives do not always follow the regular evolution on the tools, so here you need to use the evolution as best you can and the tang stamps + the emblems. You need to have attention if the knife is a regular economy knife or if it
got advertising (promotion). Another detail is that many knives found by collectors show the hot stamp economy emblem before 1979, in the 70s but with some small differences.
On the picture from
the left is the knife that was difficult to say for sure, the Ibach factory sad:
Out of regard for the specialised trade, in particular the Swiss Master Cutlers Association, the Ecoline pocket knives
were produced from 1979 to 1994 with a different form of the logo and with light-red handles for a large-scale Swiss distributor.
The next two knives got the emblem used 1979-1994 and it got the
1976-1980 tang stamp. The tool evolution show no 90degree function or sewing eye. Also some other details should put these knives in 1980.
Then on the picture you can see a knife 1985-1994, again
I do not trust the normal evolution. The emblem got a small variation but this you can see in many dates. The flat screwdriver got a 90 degree function and it got a sewing eye. The tang stamp is the 1980-2005 type. There is also a big V in Victorinox on the
tang stamp + some other details say I would recommend it to 1987-1992. The last knife show the emblem used from 1994-2007 and this is a more secure emblem and one may use the evolution on the tools. After 2007 the emblem is almost the same but:
The connecting beams are depicted in the cross since 2007. If the knife is a promotional product the dates may vary.
I recommend collecting eco line
knives they are fun, I am lucky to have some older knives than the knives (emblems) shown here but they got no emblems. They got an inlay or icon in the handle.
The emblems on the picture are
on knives that is some of the most fun to research!