What is the age of a 410 LeFever Nitro Special shotgun serial A205871?

To determine the age of a 410 LeFever Nitro Special shotgun with the serial number A205871, you would need to consult the production records of the Lefever Arms Company. Generally, LeFever shotguns were produced from the early 1900s until the late 1940s. Based on the serial number, this specific model likely dates back to the 1930s. For an exact year, reference to a detailed serial number chart or records would be necessary.