Sorry for jumping in, but I think perhaps I know what Randy is referring to. And from my experience, Randy is much like an attorney, he only asks questions he already knows the answers to...

Not true

. But I do know when 2+2 <> 4 and am resourceful enough to find out why on my own if need be.
But really, I wanted to know from someone that has one, as I currently do not. You know, verification from a trusted source and all that.
BTW, that was a low blow, Oscar

In the below pic of my 19" WG7901, the corner/corner dimension of the "screen" (gray) is 19" exactly. The corner/corner dimension of the "tube" (black) is 20.5". Is that what you are after?
Exactly, thank you very much. You just saved me a huge amount of typing

What I was trying to do here was define which standard arcade monitors followed, the TV or Computer standard. As you probably already know, that 19" monitor would be a 21" in "computerese".
I'm going to go wayyyyy out on a limb here and offer a hypothesis on all of this.
The arcade CRT adheres to the TV sizing standards. The large dot pitch and low cost of the normal TV tube make it pretty probable that the same tubes are being used in the production of arcade monitors, so the sizing was likely a carry-over.
Make sense to anyone other than me?

RandyT