just to add to Doug D's post.
from the 'yellow book' of Griswold gem pans:
they only list 3 variations (the one you describe is the most marked, the other two have less markings)... actually version 1 is completely unknown as they don't have any examples, but the handle is different than the other two styles. the second variation is only marked 'no 19' and '966'.
variation one is obviously rare (no known examples, just pictures)
variation two and three are listed as 'rarity 8' 'rare'. and values of $500 to $600!!!!!!
the values in the yellow book are very old and not always accurate... but #19 is a pretty rare pan.