Red Dot question

[eastwood44mag]

A while back, a friend gave me a Tasco Red Dot that he didn't want. Works just fine, but I have no idea as to whether or not it is actually made for a centerfire rifle.

There's an alpha-numeric code on the side of it, that I can't remember (I'd have to look it up). It doesn't look like a model #, though.

Can anyone offer me help as to identifying it?

Thanks.