1960
Your western field 410 shotgun was made by mossberg for montgomery wards(western field).The mossberg model designation was mossberg model 183T.These shotguns are currently valued at between 50-125 dollars.
To break down a Westernfield M150D .410 shotgun, first ensure the firearm is unloaded and pointed in a safe direction. Open the action by pulling back the forearm and then release the barrel by turning the barrel latch, allowing it to pivot away from the receiver. Remove the barrel from the receiver and then detach the forearm by removing the screw or pin that holds it in place. Always refer to the manufacturer's manual for specific instructions and safety guidelines.