Awhile back I purchased a Lionel prewar 1680 tank car and a 1682 caboose. Last weekend I found what I thought was a matching boxcar, except for it had box couplers instead of latch couplers. Any way, I noticed later that the boxcar is a 2679 not a 1679. They all look a like to me except the couplers. Is the 16xx series the same as the 26xx series except for the couplers, or is there more to it than that?
There's something about the litho on these cars I find interesting. Marx lithography is so much more realistic, even on the 6" cars. These look to me like they were drawn by Disney animators back in the day. Not that that's a bad thing. 
Thanks.
