One of my best buys Doepke Caterpillar D-6 Dozer for $5 at Yard Sale Spring '12

I picked this and some other old Tonka's up at a yard sale in spring of 2012 for $5 a piece. I recently saw Tonka's fetch some high (for me) money at local auction house, so I almost left this one because I didn't recognize the markings. When I saw what they sold for on eBay I almost sold it myself but decided to hold on to it. Not in the greatest condition and missing tracks but original.