early or late OT-90 optima mid wheel?

[lllyf]

as we know kyosho OT-90 wheel just like that my first picture showed,the adapter structure like the ten cross，but I found I have one pair special wheel,just show as the 2nd pic.very simple design, is that the early or late optima wheels?

http://img14.poco.cn/mypoco/myphoto/20130313/17/1735425202013031317343107.jpg

http://img14.poco.cn/mypoco/myphoto/20130313/17/17354252020130313173359060.jpg

[Naushad]

My my Yun Fei, you do pull out some unusual parts. I can't help you here. Maybe a third-party manufacturer?