Kine theodolites, that takes me back. We installed a pair at Warton in the seventies. Again, WW2 German technology, brilliant engineering. With the covers off for servicing it was mesmerising and deafening as the shutters wafted back and forth and the geneva wheels stopped and started, they sound just like a loom (anyone who's been in a weaving shed knows what I mean) and those magnificent binocs sat on top, magic.
