Karl Friedrich Boser ( 1809 - 1881 ) was a German painter. Karl Friedrich Boser s works have been auctioned off multiple times, with realized prices varying according to the size and medium of the artwork, for instance of 3973.84 USD for PORTAIT OF ALFRED PRINZ ZU YSENBURG-BUDINGEN AND THEKLA PRINZESSIN ZU YSENBURG-BUDINGEN. in 2004