High oil pressure?

[Tobermory9@aol.com]

Hi - 
I took my '71 TR6 out for a spin last night and noticed that the oil pressure 
gauge was running high.  I waited until the engine had cooled off and checked 
the oil level, but it was just right - neither too much nor too little, and 
the oil was crystal clear.  This is the first time this has cropped up - what 
are the possible causes?  Please explain in simpleton's terms.  
Paula K