Vintage Brass Maritime Clock from Datema, 1980s

Vintage ship clock made by Datema in Netherlands during the 1980s.It features a brass body frame and clear glass cover. The battery-powered clockwork works on 1 x C-LR14 battery.
The weight of the clock is 0,7 kg.
Back diameter : 18 cm.
Front diameter : 12 cm. This piece has an attribution mark,
I am sure that it is completely authentic and take full responsibility for any authenticity
issues arising from misattribution