I'll try to post the pictures
This is some of them, center ones are chrome, reproductions are on the right.
This shows the 1949 and 1973 dates. notice how hard the 49 is to read on this one
Thr brass copy is on the left, an original in the center, and aluminum on the right, and gives you some idea of the size difference.
Original bears with tractor are selling for $150 and UP
in the antique stores around here, when they can be found. An average price is probably closer to $200. Bears without the tractor are less, and as people learn the difference's the price has come down quite a bit on eBay.
They were only made at the Louisville Works.