Hi,
The Master Control was 37 mm, like the Master Moon, Master Date, Master Perpetual Calendar (automatic) and Master Reserve de Marche.
The manual wind Master Memovox was 36mm.
The Master Geographic was 38mm, like I think the Master Reveil (automatic Memovox).
There were indeed smaller versions of the Master Control, and a mecaquartz Master Chrono.
And finally the Master Ultra Thin in 34mm.
Cheers
Dje