Dave Flitton
There is no way to tell if you have old stock or new stock. Old is the black vinyl, the other the tan DS tracks, both glue well

Derek Huggett
Hi Dave - Yes, I thought so. As both the attached reviews have used early stock models, no reference is made to DS tracks, so I thought I would add a note accordingly. Another case of model specs changing (albeit in a subtle manner) as time passes - something not uncommon with models from Far East manufacturers!!! 🙂