I see a lot of CD 110.5s and almost expect to see chips on the spiral screws. They always seem to be there. This one is an exception. The spiral screws are chip free. There is a tiny base flake but none of the base embossing is affected. Also on the skirt there is a tiny flea bite. The insulator is base embossed +NAT. INSULATOR CO.+ PAT. MAY. 1. DEC. 25.1883. JAN.1. OCT. 7. 1884. There is also a 1 embossed on the dome. It has continuous threads although there is semblance of segmented threads. I think you would be hard pressed to find a better looking National corkscrew especially at my price of $85 shipped.