Hans Erni Litho Die Fohen signed numered

This is one I need some help on guys, I just recently purchased this for my personal collection, I fell in love with it the moment I saw it. It has fantastic color and fits into my mid century modern home and color scheme. I have been banging my head trying to find info, searched everywhere on the net. THANK YOU KAIR!
It is a numbered series, and has the definite age.It appears under a loop to be a screen print. It is Stamped L'oeuvre Gravee in the lower left.. It is signed on the right lower corner but it is near to impossible to make it out. Hans Erni litho titled Die Fohlen 1993 numbered .

The Swiss painter Hans Erni was born in Lucerne in 1909. He collaborates with an architect before beginning his art studies, in 1927, at the School of Art and Crafts in Lucerne. As a result he becomes a student at the Julian Academy in Paris, then at the School of Applied Arts in Berlin in 1930. In Paris, he meets Jean Arp, Mondrian, Brancusi, Calder, Henry Moore and others. He is strongly influenced by the works of Braque and Picasso. In 1934, he adheres to the Abstraction-Creation group; it is the following year that he organises his first solo exhibition in Bale, Switzerland. Erni is, in 1937, a founding member of the Allianz association. He travels a lot in Europe, Africa and the United States. Painter of overflowing activity, Hans Erni participates in numerous collective exhibitions, in France and abroad. Several solo exhibitions definitively mark the discovery of his work, from immediately after the war (Lucerne, Winterhur, Rotterdam, Genève, Chicago, etc.). From the 30’s Erni produces important mural compositions.

His graphic work abounds, his illustrations as well, often with a great richness; it is he who accompanies Eluard in ‘Sommes-nous deux ou suis-je solitaire?’ (Are we two or am I alone?) From ‘Au Vent d’Arles, 1959’, a work that the poet considers his greatest work of his vast production! Enri, who is interested in ceramics and theatre, equally write and give many conferences.
In 1977 the Hans Erni Foundation is created. In 1979, the Erni Museum, in Lucerne, opens its doors, a museum that houses a large retrospective of his work. Always marked by his incredible dexterity for drawing, his enormous production, that embrace the all the genres and all the techniques, placed between abstract and figuration, often tinted with surrealism.

In 1977 the Hans Erni Foundation is created. In 1979, the Erni Museum, in Lucerne, opens its doors, a museum that houses a large retrospective of his work. Always marked by his incredible dexterity for drawing, his enormous production, that embrace the all the genres and all the techniques, placed between abstract and figuration, often tinted with surrealism.