Found this R-5 whlie walking the CSX line here in Nortonville. First one I've found with the pin still attached and was wondering if the pins are hard to find or maybe collectors just leave them and just remove the insulator. Picture shows another old pin for size comparison. Thanks to Dave Dahle for following info : It's my understanding that the R5 was made to fit the steel shank of a regular wood / steel pin after taking off the wood cob.