Hey guys
I was hoping somone could help me out a bit.  My Grandfather had 3 Oliver tractors, 77, 770 and a 1600.  I think the 1600 was about 1964ish???  I can't find any information about the 1600 anywhere, I was hoping someone knew something about them, how many years were they made, they seem pretty rare, and where can I get a diecast of all 3, I really want a 1600 diecast, but can't find one.
Any info is a big help
                            thank you