Luxman B-1, anyone have? heard?

My thinking is its a Japanese model only as I couldn't find anything on my usual Luxman web sites. My guess is its part of the  Laboratory Reference Series they were a slim line series. 

 I'm a big fan of Luxman and have had a few of their integrated amps over the years. Interesting item though, little mono 100wpc amp. 

How can a mono power amp be 100wpc when there is only one channel?

Here's the amp on the Luxman japan website, google translate worked very good in order to know about this design info

http://www.luxman.co.jp/product/b-1

Luxman Japan told me via e-mail that it's a 2000 year product.

Here are pictures about the amps:

https://www.hifido.co.jp/sold/15-01312-28528-00.html?LNG=E