Re: 1951 Schwinn Panther - maybe?
The serial numbers will tell you the year month and day it was stamped, but not the model. If it is 1951 then the question is what frame design does it have... is it the straight bar (commonly referred to as the Panther or does it have a cantilever frame in which case it is not a panther. Both frame types had different models distinguished by color and paint design, decals, more or less expensive shiny do dahs (lights, fender ornaments, etc.).
Both frame designs are well made and make nice foundations for motorized bikes. Yes, pictures are what makes us happy. Welcome to the forum.
Someday when I grow up I will probably lose interest in toys with wheels, but until then...