What do you mean by "stacked style"? Have an example?
I was wondering myself, too. I believe he means laminated style, as opposed to the modern ratcheting wrenches that are forged.
If that's old stock and not in production any longer, that's kind of a shame. That looks like a great design
Out of curiosity, I tried to find a Top catalog. No dice, and their website information is pretty poor from a tool offering perspective
TOP still makes them, according to their website.
http://www.toptools.co.jp/products/1375/
MCC is another brand that offers them:
http://www.mcccorp.co.jp/catalog/catalog.htm
These offset wrenches are catered toward the construction/heavy industries, and tend to be unpractical for automotive use.
KTC used to offer them too, but they stopped production many years ago to make way for the earliest versions of the "modern" ratcheting wrenches coming from Taiwan.
I've never seen the spring/pawl mechanism of the TOP style, but I can't imagine it being very different from the Taiwanese racheting wrenches pictured above by Dutchgray (the Stahlwille ones). Those Stahlwille ones are made by KABO. The inner working is very simple, with only a few peices, and is a design that's capable of withstanding high loads.
Deep offset ratcheting wrenches from KABO were once offered by SK's G-Pro lineup (post-Facom / pre-Ideal days):
These weren't big hits in the automotive scene because of the large clearance needed to engage fasteners, and the spline drive concept being quite new to the market.
Back in 2012, I found these in Japan, sold under the Signet brand. Note the location of the direction button....yes, like the Stahlwille, it's a KABO. I don't know if they were old stock or not:
There's also SEK, under their Pro-Auto brand:
