Happy to acknowledge you all that our Polikarpov I-15 kit is complete at last, once pilot cast and decals printed. You can see these latter in detail below:
As you can see, decals sheet includes not just basic national markings for Soviet and Spanish Republican service, but also the insignia for 3 different Spanish Republican Squadrons. A set of red-yellow-purple roundels has also been included in sheet for two main reasons: first, due to having read that some of the first I-15 arrived from USSR might have been marked in such livery; and secondly because 1/100 Republican roundels are so hard to find that many might consider it an added value in itself.
You can find this nice aircraft straightly at Minairons website, or alternatively ask for them to any of the traders in this linked list.