The yellow cable features an incuse "F" inside a tilted square on one ear - the marking runs off the edge of the ear. V VNM condition. $11.50 postpaid. Gray signal is without markings and in perfectly mint condition. $9.50 postpaid. I'll include the mint white Thomas ear-incused bell for $2 extra with the individual purchase of either colored porcelain, or you can have it for free if you buy both for $20 shipped.