Mystery frame

[DuoTech]

Can anyone help identify this frame? The rear triangle looks quite distinctive. No serial number on it. The Truvativ cranks and RST Zeta forks were on it when I collected it and I assume original components. Guessing it's '99 (ish). Cheers.

 

[EarlofBarnet]

It looks like a Coyote HT3, which has had the paint stripped from it.

 

[DuoTech]

Fantastic. Cheers!