A couple planes

[Allan Speers]

Maybe that adjustable knob is for use with a shooting board?

Pretty cool frog & depth adjuster. How does it compare, function-wise, to the Bailey type?

[steven c newman]

Google up Autoset. These were desgined to compete with the bedrocks. You's set the iron where you wanted it, and IF you neede to take the iron out to sharpen, you could then just place it back in the plane, and go right back to work.

Sometimes also called "VBM"

[Dave Parkis]

If it would help I can take some better shots of the knob for you. Does your 722 have the adjustable knob also? I ask because this knob is much taller than any of the other planes I own

Yes, mine is supposed to have the adjustable front knob. Pictures would be a big help. A picture or two of the bottom to show the recess would be great. Thanks!!!

[Brian Hale]

A couple numbers.....

Bottom diameter 1.8"
Neck diameter .98"
Top diameter 1.8"
Overall height 2.8"
Radius of the bottom recess A 2.5" diameter spray can matches pretty good
Brass nut .4 diameter x .75 tall

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[Dave Parkis]

Hi Brian, Thanks VERY much for the pics and the measurements. Now I need to start asking my buddies with lathes for a small favor

[Brian Hale]

No Problem Dave, Let me know if you need anything else.......