Well it turns out that:
1) My guitar isn't a teisco (or at least isn't a classic tiesco ie. its from the knockoff period) (Its strat shaped with two pickups)
and
2) The TOM does not drop straight onto the posts on my guitar. (That I didn't even bother to measure the distance between the posts and compare them to a TOM before posting is testament to my stupidity)
To clarify, my guitar doesn't have posts that go directly into the body, instead there is a flat bar that screws onto the body and at either end of this bar there are posts with height adjustment.
This guitar has no manufacturers markings at all. I got frustrated trying to identify its maker online so I took it to two local guitar stores, both guys said they thought it was a Tiesco, although one of them did say he thought it was a later less desirable version.