ACOG reticle, .223 or .308?

[john.41]

I looked at a used 3.5x35 ACOG yesterday, wasn't mounted on a rifle. How can I tell if the reticle is calibrated in .223 or .308?
I haven't found anything for sure online, or on the Trijicon site. I want to be sure before I shell out the money.
Sounds like I will have to contact Trijicon Monday with the model and serial number to be sure.
Any one know of another way by just looking at it?

[no im not squinting]

Look at the far bottom of the reticle when looking through the optic, into the bottom edge of the housing. My TA-33RH says 5.56 on the bottom. Make sure you are looking out to a lighted area so it appears.

[john.41]

Thanks for the tip! I didn't notice the tiny eye test writing, at the bottom of the reticle housing.
Marked M14 100-600
over M240 700-1200
Looks like 7.62 for sure.