Vintage PK blue umbrella . 
It has a gold chain and  a brownish amber knob handle that is a lucite or bakelite material I am not sure of the knob
It has a sheath slip cover with the PK closure snap
The tip is metal and the slip cover has a metal end that slips over the tip 
It measures approx 20" from tip to end of knob.  
it extends out an additional 6"
for a total of 26" extended.  
The umbrella is 32 1/2" wide from tip to tip 
the chain hangs 5.5 "
100% Nylon 
RN 16271
made in USA