Detroit, Michigan. Michigan Insurance Bank. 1860s $1. PMG Choice Uncirculated 64. Front Proof. (MI-145 G2a) Plate A. Six POCs. 18__ Proof. Printed on India paper. Imprint of Danforth, Wright & Co. The Michigan Insurance Company was organized in 1834 but changed its name to Michigan Insurance Bank in 1860. This really scarce Proof bears that second title.