IRC Hard Dry Track Tyres - What Year?

[Redline]

Hey dudes,

Ian (bodamus) has kindly allowed me to use some pics of his pair of IRC Hard Dry Track Tyres as I may be purchasing them. 

Thing is I need to know what year they are from, Ian thinks that Clint Miller used them BITD if that helps.

I was kinda confused when I saw the pics as one has a different tread pattern to the other and looks like a Snakebelly but Ian assures me that they are deffo a pair 

Any help would be much appreciated guys 

Many thanks

John

[bodamus]

I don't know

[brummie]

no idea John, nice though aint they
i have a comp IV front and comp VIII combo on a ta similar to this look