Size 38 x 42 without srew down crown.
Gold medallion on the back side, and mineral glass.
Eta movement calibre 9162, ESA 1550 with 12 jewels
Movement no: 16330582
Many watches do have a replacement movement after repair which was normally in the early days.
F300 movements were used by every watchmaker like IWC, Omega, Longines, Tissot etc.etc.
All Bulova license.
It was cheaper to replace a movement then repairing.
Signed original Eterna buckle.
Perfect working, correct date change.