This is a very nice, clean single rope pulley marked "1398" on one of the outer cast iron spokes of the pulley wheel frame.  Also marked 760 N on the inner pulley wheel spokes.  Top quality, believed to have been made by Starline.  This one has a nice spoke wheel and sort of cast cut-out design.  Originally produced in the 1910's to 40's era.  The all metal design of mostly cast iron made this design very strong and durable.  The rope carrier is 4" wheel that has a steel bushing, with a steel rivet at the center.  The cast iron pulley wheel is in good useable condition with smooth movement a little wear, no damage.  At the top of the assembly is the double action swivel which has a steel nut and bolt to hold it in place.  Works great.  From the top of the swivel link to the bottom of the pulley is 9.5".  There is no rust evident on the steel, it's mostly black painted with the hanger hook being more of a silver color paint or coating.  The hanger hook is marked 5/16" the size of the hook slot for connecting to a 5/16" chain.  Overall a nicely formed barn/farm use type rope pulley!