1972 AD., Austria, Calender Medal 1972, engraver: Hans Köttenstorfer, Vienna mint, Strothotte 1972-12b.

Austria, Calender Medal 1972, engraver: Hans Köttenstorfer (1911-95), Vienna mint, 1972 AD.,
Medal (40 mm / 24,93 g), 0.900 silver, axes medal alignment ↑↑ (0°), plain edge with punch “A 900“,
Obv.: JAHRESREGENT / SATURN / KÖTTENSTORFER , Saturn as steersman on boat sailing left above clouds, symbols on sail and rudder, stars in fields, engraver´s name below.
Rev.: SONNTAGE / 19 - 72 / MÃœNZE WIEN , sundays of each month on a square, year flanking, mint name below, two circles around containing dates of Austrian public holidays in 1972.
Edge: A 900 -punch
Strothotte 1972-12b .

Hans Köttenstorfer was born in 1911 and died in 1995. He also worked for the Austrian Mint in Vienna or at least contracted designs from them and it seems obvious that he did freelance work as well. He designed coins, (the reverse of the 1960-2001 Austrian 5 Shilling piece for one), quite a number of the Austrian Glückmünzen (Lucky tokens), numerous Kalendermedaillen (Calender Medals) and many other medals as well.
More on https://de.wikipedia.org/wiki/Hans_Köttenstorfer