The history of the Seiko made in Japan clock. Like these vintage gems. Made in the 70s in Japan these “slave” clocks were all connected by electric wire in the boat to the mother clock which was located in the captain’s cabin. This set the time of the boat at each change of time zone and put the hundreds of clocks on time at the same time. This clock had originally a secondary slave connection but has been now converted to battery operated movement. IF you want with original machine kindly confirm with order. For more information do not hesitate, send us a message!