Build date for Walther's cryo-reefers?

The build date should be on the car, itself. Use some sort of good light and magnification and all will be revealed.

 

I think they are too modern for you.
Cryo-Trans

 

I found two articals about the GATX Arcticar, this one..
http://www.findarticles.com/p/articles/mi_m1215/is_n5_v192/ai_10732818
It is from Railway Age May 1991

And one that says..." Arcticar, introduced to railroads in 1992".

So its good to say that early 1990's would be the correct era for this car.
Thom