This German made 7-1/8" diameter, 4" deep mechanical ship's bell clock is solid brass and manufactured in Germany. The bell can be silenced with the on/off lever. The brass flange is predrilled with four (4) mounting holes,bras screws included. There is a (1) year manufacturer's warranty from Hermle. We also offer a 30-day money-back guarantee if you are not completely satisfied with the clock. The ship's bell strikes in 30 minute increments over a 4 hour "watch" period. There is one nautical bell strike for each 30 minute segment beginning with a single nautical bell strike at half past midnight and counting up to 8 bell strikes at 4:00 a.m. marking the end of the 4 hour watch period. At this point the bell strike pattern begins again at a single strike at 4:30 and counts up to 8 strikes to 8:00. The cycle is continuous over the 24 hour shift watch period.

Nautical Bell Schedule:

12:00, 4:00, 8:00 =8 bell strikes

12:30, 4:30, 8:30 =1 bell strike

1:00, 5:00, 9:00 =2 bell strikes

1:30, 5:30, 9:30 =3 bell strikes

.... continues counting up to 8 bell strikes.