I recently picked up a Griswold corn or wheat pan, No. 282 630. My pan is smooth on the bottom but in trying to research the pan online I see there was a variation of this pan with feet, same numbers on bottom though. Were these pans from different circa eras? Why were there two variations? Also, does anyone know how long these pans were in production? I would put a pic online but my pan is in my lye tank at the present time; however, I think it’s going to clean up nicely as it was in good shape.