Bulova 1957 Senator "G"
I believe this is a 1957 Senator G as can be seen in the 1958 Adverts' #11
Case measurers 40.64mm lug to lug and 33.08 Back of case says Bulova L7 . The movement is also stamped L7
Plainsman has a Unknown in 1957 data base that is the same, his is in much better shape than mine, although mine does run and keep excellent time. I believe this is also the original band, leather looks a little different.....