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Is this "open" missing a centre pin, or is it OK?

Question asked by drkirkby on Jun 7, 2014
Latest reply on Jun 9, 2014 by drkirkby
I have an Agilent 85039-60009 male "open" standard from an 85039B 75 Ohm "F" cal kit. It has no centre conductor - see pictures. Is this normal, or damaged? 

According to

the offset delay of this is 53.6 ps, so I would have expected a conductor of length around 16 mm behind the reference plane, but there is not.