How can I identify the manufacturer of my windows?
Contact a builder or building supply store in your area to see if they can help you identify the manufacturer using the information. 

If you cannot identify the manufacture, consider repairing the damage to the window without completely replacing it. You can replace a broken latch or window pane, or have a professional do it for you, and this may be more affordable than replacing the entire window. On the other hand, if the windows are generic in appearance, you may be able to replace the whole window without destroying the overall look of your property.