Hello!!!  I have been trying to find a similar tool for verification, with no luck. It is stamped Douglass Mfg. Co. on the tang. The cutters are stamped with what looks like 5L. The bore is 3/4" diameter, and the overall base diameter is 2-1/8". The cutting edges sit proud of the base. At first I thought it was a tenon cutter, but it doesn't make sense to me, plus the cutters are fixed. Is there such a thing as a tenon trimmer? Thanks, Lou

The blades look similar to this special drill bit.

https://tsoproducts.com/workholding-accessories/ujk-technology-20mm-centrotec-drill-bit-spare-for-parf-guide-system/

Hello, yadda. Thanks for the reply, but I don't think there is any chance of ever drilling a hole with this brute!!! Regards, Lou

https://www.google.com/search?hl=en&biw=1280&bih=837&tbm=isch&sa=1&ei=tEm9W7jhBYiLjwTVq4zwBQ&q=Douglass+Mfg.+Co+tenon+tool&oq=Douglass+Mfg.+Co+tenon+tool&gs_l=img.3...114200.122174..122440...2.0..0.92.1308.16......0....1..gws-wiz-img.GT9m-1yLz8Q

see if these look familiar or similar to yours

Hello, p_toad. Thanks for sending. The bases/bodies that you posted are very different from what I have here. Mine does not have the angular blade rests, nor does it have the slotted/adjustable blades.  Regards, Lou

Lou, hard as it is to believe, it is indeed a tenon cutter, sometimes called a hollow auger. Try looking at James Swan rather than Douglass. Swan bought Douglass.
Take a look at this link.

https://www.jimbodetools.com/products/9-16-inch-hollow-auger-57351

Mike

Hello, Guys. Thanks for all of the input. I will concede to calling it a Tenon Cutter. Most Hollow Augers cut multiple size tenons, the blades are adjustable, and the blades are mounted at a steep angle. Some are fixed diameters with adjustable blades. The set ( angle) of the blades that I have does not match any examples that I could find. It is safe to say that this is a fixed diameter Tenon Cutter, (3/4"), with fixed cutters. I am guessing this is used in the traditional way, first cut is with a Spoke Pointer, and then the Tenon Cutter is used. Regards, Lou

Yes, if you try it out it will make more sense. I actually use a good bit of those, other tenon cutter, spokes cutters (is that what they're called?... just know how they work!). They are really quite handy.

Hello, Bird. Trying out the spoke pointer, and the tenon cutter, is on my list of things to do, along with insulate the garage walls & ceiling, level the floor, move the workshop out of the basement, etc., etc.  Regards, Lou