CS1233DE seems like a marketing number that might have been painted on the machine. Is it the factory model number off the back of the base?
Noma was made by Murray and many models are similar with only slight variations of options like light, starter, paint & etc.
A typical Murray 1233 exploded view is here:
http://www.partsandservice.com/html/Murray/st/st633124x89a.html
You can possibly find your model or a similar model exploded view here:
http://www.partsandservice.com/
For an operators manual there are many collections on the net with manuals similar to your Noma you can use. Murray = YardKing, many Craftsman, many Sears, Eagle, Brute, & etc).
If you have a machine issue you can post it. If you have an engine issue post the factory number from the cowling which will be on a tag, plate or stamped.