Need help IDing these lenses

I just found this for sale and am interested in possibly picking it up (it's garage sale prices). I only want it if that prime lens on the camera is either the rokkor 50mm 1.4 or possibly the 58mm 1.2. I just shot with the 1.2 this week and loved it, would love to have a good manual lens in my arsenal to play with. The people that are selling it don't know off hand what lens it is but are supposed to call me later. Here's a pic, it's too small to zoom and see what the writing on the lens is but I thought some experts here might be able to give me a ballpark idea

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Looks like a 45mm f2 to me. See here about half way down: http://www.rokkorfiles​.com/XG%20Series.htm

The front element is not big enough to be either of the 2 lenses you mentioned.

Very useful link, thank you. You're right, it does look a lot like that 45mm but at the same time the text on the lens doesn't appear to be in the same position as in the pic of the 45... so I can't know for sure yet. I have a friend who picked up this exact same body with that exact same zoom lens but it also included the f/1.2. It's really hard to tell, I'm wondering if these lenses came packaged together in some sort of kit?