What did I Buy? (Carb ID help)

Carb I bought on E-bay arrived today. Can anyone tell me what I got from the tag numbers? The tag was somewhat mangled but this is what I think it reads......

70888
B 6 02 B

Here's the e-bay page it came from

http://cgi.ebay.com/ebaymotors/ws/eBayI ... 1872345621

My intent is to adapt this to my older 200

Thanks

Looks like the Carter YF. Also looks like it's missing the choke cover, which is going to make starting adjustments tough...

I had figured it for a YF . I'm looking to verify size, cfm or engine it's for. I may rig up a manual choke for the time being as that is what i've had on the old 1100 that's coming out. I may just experiment with this one and if it gets rid of idle problems etc - go for one in better condition.