This is another master clock that’s a variation of the C7 . It’s designed to be used with conventional systems or with electronic relays and or distribution boards. There is also an option to give a 30 second duration output every 30 mins . The service record sheets suggest it came from Pembury hospital in Kent . I find it a little confusing as on the front of the clock it says the time is displayed in GMT. . I find that a bit confusing as if it was used in the hospital why would you want the time in GMT all year round. The clock is in very good condition and has been well maintained. It’s nice to have the original paper work 
It was manufactured in Feb 14th 1966 Andy 
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Hello Gents
Thanks for posting Andy
And yes really nice to see the original record sheets.
Simon