Dating 24s

Based on your description, I would say you have a Model 24 Field Grade Series P. Prior to 1968 the Model 24 didn't have serial numbers, but they did have coded stamps with identify the date of manufacture. This info can be found in the FAQ pages.
Your gun has a serial number, but as of yet there is no what to positively identify what year it was made. I'm working on that though. I can tell you the Model 24 Field Grade guns appear in the catalogs from 1972-1988 and in Series M, N, P, and S. The Series P was likely made between 1975 and 1979.

There were several varieties of the Savage 24 made and several had variations within varieties. Here is a brief accounting of models made by catalog appearance.

Stevens Model 22-410 (1939-1949)

Savage Model 24 (1950-1964) Includes the models 24, 24A, 24B, 24E, and 24H all had full length brazed barrels

Savage Model 24 DL De Luxe (1962-1968) Includes the models 24-DL, 24B-DL, 24C-DL, 24E-DL, 24H-DL, and 24J-DL

Savage Model 24S Side Lever (1964-1972) Includes the models 24S, 24S-A, 24S-C, 24S-D, and 24S-E

Savage Model 24V center-fire (1968-1988) Includes the models 24V, 24V-A, 24V Series B, 24V Series C, and 24V Series D

Savage Model 24D Deluxe (1969-1983) Includes the models 24D Series M, 24D Series N, 24D Series P, and 24D Series S

Savage Model 24C Campers Companion (1972-1988) Includes the models 24C Series M, 24C Series N, 24C Series P, 24C Series R, and 24C Series S

Savage Model 24 Field Grade (1972-1988) Includes the models 24 Series M, 24 Series N, 24 Series P, 24 Series S

Savage Model 2400 (1975-1979)

Savage Model 389 (1988-1990)

Savage Model 24F-12T Turkey (1989-1994)

Savage Model 24F Predator (1989-2007) Includes the models 24F and 24F 410er

Savage Model 42 (2012-present)