When was your Browning auto 5-12 Magum 05697PY151?

The Browning Auto-5, also known as the Auto-5 Magnum, was produced from 1973 until 1998. The serial number you provided, 05697PY151, indicates that your specific shotgun was likely manufactured in the early 1980s. To determine the exact year, you can refer to Browning's serial number lookup tool or consult a firearms expert.