Small Engines (Lawn Mowers, etc.): Atlas Lawnmower, atlas model, engine numbers

Question
  I have a Atlas Lawnmower that is in bad shape but run well. I need parts for it, but am not able to find anything about this lawnmower, including the internet search. Can you help me?
Make Atlas,  Model # 1211 21" SN PF5845.

Answer
 Hello Jan:

 Atlas was manufactured by MTD or AYP (electrolux). Can you Send me the Engine Numbers. They should be Located above the Spark Plug on the Metal Engine Cover. Also If you tell me Which Parts you are looking for I can Better Assist you. Some Parts May be Avaliable from After Market Distrubitors.  Thanks.

 Respectfully

 John