There are some civil airliners that are just beautiful and the Convair jets definitely fall into the catageory for me. They have been quite well represented in 400 scale but there's barely been a release in more than a decade. Here's a look at production across the 6 existing moulds for the pair:
Convair CV-880/990 1:400 Scale Mould Review
A review of the moulds available in 1:400 scale die-casts for the Convair 880 and 990
www.yesterdaysairlines.com
