Oddball Circuit 1000 (scorpion/tomahawk/etc.) front tire..

[Lowgear]

Heres a good shot I snagged from Tamiya Club:

[AscotConversion]

The plot thickens, as those tires look like the EARLY Scorpion tire....Must have just re used the mold with a different sidewall.

[DennisM]

The early Scorpion had 6 grooves, sharper around the edges and GoodYear on the sidewalls.
The two nearest to the right has GoodYear on the sidewall, the one to the left has SandSuper.
Three different tires. The middle one has 6 grooves the other two has 3 groves.