Ventura v-matic Loga 7750 Chronograph

The great turning Bezel/Top of the Case
which turns the whole crystal plus the inner bezel is something that you will not find too often. The top part of the case is turning bezel and slide rule scale. This was one of the features I bought this watch for: a turning bezel and sapphire crystal that would protect the slide rule scale. This SEIKO e.g. which I love very much, only allows to turn the slide ruler via the crown at position 9. And reading the slide rule scale is a lot more difficult. Of course the SEIKO's hour and minute scale for flight calculations add to a busier slide ruler. Being able to grip the whole bezel and turn the slide ruler including a clear slide rule printing make "hitting" the right numbers and reading the results a lot easier and faster.