Typically these were offered as pattern makers chisels. In pattern makers trade
catalogs I’ve seen these. Most edge tool makers didn’t specify what trade they
were for, but the presence in the pattern maker trade catalogs seems to support
this idea.

take a look at the second image from the top. There are very long chisels in the
tool cabinet on the wall.

http://toolemera.com/Photographs%20Of%20Trades%20%26%20Crafts/tradespat
tern.1.html">http://toolemera.com/Photographs%20Of%20Trades%20%26%20Crafts/trade
spattern.1.html <http://toolemera.com/Photographs%20Of%20Trades%20&
%20Crafts/tradespattern.1.html">http://toolemera.com/Photographs%20Of%20Trades%2
0&%20Crafts/tradespattern.1.html>
...............................
Gary Roberts
http://toolemera.com
http://toolemerabooks.com

"I'ld rather read a good book, than write a poor one." Christopher Morley




> On Dec 16, 2014, at 8:38 PM, Ron Harper  wrote:
> 
> Habitues of the porch and sons thereof,
> 
> several times in the last few years I have read in a blog or article or
> some other account, of folks using thin paring chisels honed to 20 degrees.
> They are often mentioned in the very final paring of dovetail base lines.
> If I recall,  these are almost always old tools of Sheffield origins.
> Anybody set up like this? Anybody have any to sell.  Are they really
> significantly thinner? Does that, in fact, matter?
> 
> Thanks
> 
> Ron. A Kokomo Galoot who is looking forward to a day in the shop tomorrow.