Bulova 1967 Senator "M"
Looked long and hard to find this one. It finally turned up in a 1965 ad shown as reference in last photo.
1967 Senator "M". Case and movement marked M7.
Linen textured face with numbers at even points, stainless back 17 jewels. Ad is poor quality but clearly depicts a square based texture on face and slight stepped sides. An upgraded version of the early 60's "J" with different hands and a modified face.
If everyone agrees with my ID, it's a first for the database.