CH 1911-26 FS 2B-7B Swiss coat of arms and alpine roses, bluish green, no control no, set MNH

Switzerland 1911-26 Franchise stamps,
Swiss coat of arms and alpine roses,
bluish green paper,
B. no controll number,
6 values complete, set MNH
(SBK Portofreiheit 2B-7B, Michel 2-7II).