Hi Colin,
Take a look here for the specs on your base:
http://www.tokairegistry.com/images/catalogs/tokai86_5.jpg
There are 2 fretless models: TJB70J has position markers and TJB70F doesn't. They're marked as special models, so they're probably quite rare (in comparison to the regular basses).
As to the logo, is it black capitals or black script? To see what I mean go to the pictures page at the registry. Mr Chilli's Jazz Sound has capitals, but the other basses (Hard Punchers which are Fender Precision replicas) have a black script logo.
The black capitals logo seems to be a transitional logo, between the original spaghetti style on the very early Tokais and the mid 80s script style. See the guitars page at the registry for more info.
Whichever it is it sounds like you got a real bargain there. Enjoy it!
Cheers
James