Help with Identification: Marin Team Titanium or Litespeed frame?

[STM3]

I have an old Titanium bike that was once listed as a Marin Team Titanium on ebay (in 2004) From research it looks to me more like a Litespeed Standard Mountain Frame from 90/91. The machined finish on the rear drop out (unusual?), two holes and placement / shape of the four digit frame number, sent me in that direction.
Images are of my bike w drop out and the rear drop out on two other Litespeed frames I have found on this forum.
Can anybody help me out on this?
Thx.

 

[Mathes66]

Litespeed has a serial number lookup service. They can help you.