I collect Minnesota License plates and have most all years in pairs from 1909 to date. The last general plate was issued for the years of 1918-19 & 20 (except for the very rare 1920 only plate of which I have a pair). I picked up a pair of the trip year plates yesterday at a swap meet. This pair of plates could have been used on a Model T Ford. I like the unusual number - 20 separated by four ones. And without a dash in the middle.