What year was this Remington 521-T rifle serial number 151924 made.?

The Remington 521-T rifle was produced between 1948 and 1962. To determine the specific year for serial number 151924, you would typically refer to Remington's production records or a dedicated reference guide for Remington Firearms. Based on the serial number, it is likely that this rifle was manufactured in the early 1950s, but for an exact year, further verification is needed.