Can you decipher these numbers and letters found on a Daisey pump air rifle PAT.2.724.897 and 2.758.586.LOT. NO.0715645?

Daisy make so many air rifles, they don't serialise several models like other air gun companies do. An example is the Red Ryder, there are over 22 variations of the model starting in 1939 up to today. They make them in LOTS and batches. The models are Patented. Each change in variation can be identifies by what is new on the rifle. The model 880 can be identified by small differences in the years it was made. Your best information will come from Daisy. They offer a free service to tell you more about your Daisy (See the link below)