![]() i have one that runs but i am missing a bunch of parts. I am looking for any info on a seth thomas course clock. The Radio Officer on watch would have to enter in the logbook the fact that he had observed each Silence Period. The green zones are similarly set aside for 2182 khz, the radio telephony frequency. The red 3 minute zones were set aside as Silence Periods on 500 khz, that is wireless telegraphy or morse code, thus giving any ship in distress the maximum chance of being heard sending a SOS call. ![]() ![]() Clocks like this came in post 1912 but don't know the date of this particular model. ![]()
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