I have no idea if the Austrian State Printer made use of other private printers in the sixties besides
the Brüder Rosenbaum Druckerei, Vienna.
But the Brothers Rosenbaum did print the following Austrian stamps in
multicolor offset plus a few more I haven't shown.Scott 708 600 years Tirol 1963Scott 727 The Kiss by Klimt 1964Scott B306 - B113 WIPA 1964Scott B314 Stamp Day 1964
Originally the WIPA set was supposed to have been a one colour
recess engraving ( Austrian Nationalbank) and multicolour
offset combined but for some reason, probably technical,
there was a change of plans and Brüder Rosenbaum printed them
totally in offset.
As you can see above Michel was given the information
that they were an engraved & offset combination issue.
Rein you are right, catalogues make lots of mistakes
but sometimes they report the errors they were given.
The fact that the engraver Rudolf Toth's name is on the lower right
margin proves that these were supposed to have been at least
It was the same for the 1964 Stamp Day.
The stamp was printed totally by offset, yet the engravers
name is on the lower right margin.