Just a guess, but it is probably equivalent to the LS-75 Q in the 2000 edition catalog posted. Model numbers went up with inflation.
Veneer quilt maple top, 2 piece back, intermediate model hardware.
A catalog 27 - 2012 catalog link is posted a bit below your thread and the 2010 catalog is in the same link.
As to value, it cost about 100k yen new + about 15k yen hard case value if there is one. Check the internet for current Yen to AUS $ exchange rates.
The demand for quilt tops is admittedly soft in a market flooded with so many cheaper alternatives, so the 2000 valuation is probably going to be closer to what you can expect to get for it. Try listing at today's valuations and dropping price in increments based on the time frame you have to sell it.