[rebeltown]

Compared my old blue 00 cap with my new black 01 cap. Old 00 internals show a obvious round topped cylinder with a screened top when held up side down. New 01 internals also have a simular round top cylinder with screen top but also includes an elongated cylinder that envelopes and extends beyond the rounded part of the inner cylinder. Sorry, that's the best way I could describe it. Color may only be a difference in the manufacturer. My black 01 cap does not have a Porsche # on the outside like my blue original 00. I believe both are made by the company named "Blau" as they both have a similar insignia.