When Tri-ang went broke in the early 70s a good number of the FROG moulds were sold to Russia and marketed as Novo.
I've still got a couple of boxed DH Hornets I paid 30p each for, the price stickers are still on the boxes.
Later they were more common in plastic bags with poor instructions and equally poor or missing decals. I think there are a few of those stashed away in a cupboard too.