I got to admire this at IMM this weekend. It's a fab looking piece of kit. They are still adamant the Alloy one is a proto-casting for the Cast Iron one. I hope they will include some sort of identifier as a repro casting to stop the already terrible faking that's going on, but I forgot to ask when I was at the stand.
Of course I know what a dipstick is, you get called something often enough you look it up!