Sonne Tonneau XX Chronograph

Today's watch looks quite impressive, but is by another mysterious brand name.

The watch is by Sonne and is called the Tonneau XX. The Tonneau name relates to the shape of the case with a Tonneau case being rectangular with bulging sides (sort-of barrel shaped). I've seen a few different Sonne Tonneau watches online, and as they have different last letters,  guess that the XX is the model number.

The design looks like a 3 hand dial watch, but actually, it is a 2 hand dial with the seconds hand being the chronograph seconds display. The chronograph minutes are on a small dial at the 9 o'clock position, and there is a 24 hr dial at the 3 o'clock position. The watch also has a date display window around 4:30.

So far, like with so many of the mystery brands, I've not been able to find a website for the brand, with it's online presence being mainly shopping sites. The Sonne brand does seem to make high quality models, including limited edition collaboration pieces and both quartz and mechanical movements. Their models have a range of prices with some of the automatic watches retailing for over ¥20,000.

I've found what looks like this model reported with a model number of S052GNB with a sale price around ¥9500.