Perko Bridge Lights

These are Perko brass bridge lights that came off of either Pleasure Beach Bridge or Yellow Mill Bridge in Bridgeport, CT.  My father used to be a bridge operator there.  I have gotten an idea they are from the 1950's to 1960's, but I am not 100%.  I have 2 like in the picture and a 3rd that does not have a stand.  I spoke to a sales person at Perko and he couldn't give me any information regarding them.  I am looking to see what they are worth.

I would like to sell these, but I have not set up an account anywhere just yet.  I am just trying to gather information about them.  Also we have a friend who owns a bar on the water and he may want them for his place. 

Thank you for your help and information.

Fair