hi Ben,
As said by Parabar, your emperor is a Matsumoku made model. I have a similar model and, after some reasearch on the net, I concluded it is to be dated '82 or '83.
The frequensator has been replaced while the bridge seems to be original, even if I saw many guitars with the larger type of bridge on them. Mine has the same bridge as yours.
The thinline models are evaluated a little less then their big sisters J models (those with deeper body) nevertheless they are awesome. As far as I know actual quotation are about 1500 euro for thinline and 2/300 euros more for J models
Quite cool guitar !
