I will tell ya the Stamper has some good eyes and a steady hand.. those numbers are straight
Sometimes stamping kits have holders that will line up whatever stamps you insert into them. I used one at the second machine shop I worked in, around 2005-2007.
And even if you don't have a holder, the shanks are usually square, so you can hold them all together as a bunch and whack them all at once. Though it looks like on the Graflexes further up in the thread, that possibly the 114 or 114A were stamped, then the rest of the numbers separately.
The Dr Who flash looks like it could be close to the one in the auction, I can make out a possible 114A7"" (edit, 114A/""), and the Star Wars one kinda looks like 114A1"" (edit, 114A/""), the"" being numbers I can't be sure about.
Man, that's so awesome that y'all found one with stamped numbers, and figured it out!! Nice!
EDIT: Oops, I'm sorry, I was seeing a "7", but I see now it's a slash "/". Derp!
EDIT #2: Another derp! I've been kinda half reading the threads today, but now I finally see that lots of flashes were stamped with the same numbers. I can only blame myself so much, though, all this info is spread out over several threads!