For auction is this vintage General Railway Signal Company Type K D.C. Relay, GRS Drawing Number 53005-50 GR.6. This is a Retained Neutral Relay with a resistance of 670 Ohms. It has 2 contacts and was for use on any polarized line circuit requiring a neutral relay which will keep its contacts closed during the time ordinarily required to change the line polarity.I have gone over this relay and it is in good condition. T is one small chip in the top terminal in the back, but that's about it. The glass and bakelite are in great condition with no cracks or chips and it has the space saving wall mount type brackets. You do not want to miss out on this relay as it is the only one i currently have. I have never seen any of this type on ebay before, so do not miss out on owning this one. Listed below is the information from the inspection label: Resistance 670 ohms, D.A. .0027A, Max. W.C. .0086A, Max. Polarity W.C. .0094A Rev., Tested 4-28-48 You will be proud to own this one, so hop to it and place you bid now! If you have any questions, please ask. Thanks for stopping by and good luck bidding!