What year is a sea nymph v13 boat that has the number 496 stamped on a plate mounted to stern?

The number "496" stamped on a plate mounted to the stern of a Sea Nymph V13 boat likely indicates the boat's model number rather than its year of manufacture. Sea Nymph boats were produced from the 1960s onward, so to determine the specific year, you would typically need to refer to additional identification numbers or documentation. It's best to contact the manufacturer or check with a boating expert for more precise identification based on the model and any additional serial numbers.