This is a very nice clean antique plumb bob marked "K+E 830006" on the top thread cap section. This is well known tool and instrument maker (Keuffel & Esser). This one is 5.25" long, 12 ounces, 3 pieces, with a good steel tip, both ends are thread, good threads. The neck area is threaded at the flair of the plumb bob, or in other words that neck piece is 1.0" long plus the threaded part that is inside the main body and can't be seen in the pictures. It's in nice shape! Some tiny dings noted, otherwise minor wear. The neck is 1.0" long x .5 diameter. A nice collectible plumb bob!