R Tenn pewter brooch from Sweden

I had to do some research on this item. The maker is R. Tennesmed from Sweden. Modernist jeweler I found similar items that are listed as pewter and this seems to be the material of this piece. It has green stones. Vintage item maybe from the 70s marked on the back Pin in good working order. Measures 1 1/2 in. It has some wear on it , but it is such a cool piece, I decided to list it.