If you enlarge the picture, I think you will see that the blade facing 
the camera is indeed narrow, but the other blade is a good deal wider.  
Neither strikes me as narrow enough for dado work.  There might be a 
fence, yes.

The shaving horse is worth notice as well, and also looks like a 
double-duty tool.  The head is long, and the top seems to be for working 
with the movable and removable upright for working legs, like one we 
discussed not long ago.

It seems that the shop itself is double-duty, for there's more than 
cooper's tools in evidence.

Mike in Sacto (now on my 4th cup of java)

On 2015-01-04 06:14, Gary Katsanis wrote:
> Very unusual - it looks like there might be a fence on the right
> cheek, if you hold the handle facing away from the bench.
> 
> Both irons are narrow.  Could it be a dado plane of some kind?
> 
> Gary Katsanis
> Albion NY, USA
> (before my second cup of coffee)