This is a NavSyn Proteus GPS disciplined frequency and time standard. It tracks a constellation of GPS satellites and produces a very stable 10 Mhz standard frequency, together with an extremely precise 1 pulse per second standard time.
The short term stability is assured by the use of a Temex ovened 10MHz crystal oscillator, and the long term stability is of the order of parts in ten to the thirteen.
Offered working (can demonstrate) complete with its original box and copies of all the software and the pdf manual that came with it. Please note the 12V one is now sold. This one is identical except it is a 48V model.
Would have preferred buyer to collect from South Lincolnshire, but will post for £17. Payment by cash, PayPal family and friends or bank transfer please.