The Ultra Carry II is just their new lawyer driven safety design known as the Swartz safety system.
Every Kimber is now a "II" series with this safety. It is the safety that many do not like for it's inherent problematic inability to disengage during firing. The grip safety has to be depressed a certain way in some production pistols out of the box. Meaning it will not disengage the Swartz safety system if the grip safety is not pushed in in just a certain way.
It's been a heated debate with 1911 afficiando's for some time.
I'd say yours is the series 70 without the "dumb mans" safety. How old ? Don't know, but it is a better pistol than what Kimber produces today.
"When a government robs Peter to pay Paul it will alway's have the support of Paul" George Bernard Shaw