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The Mark VII quill feed and quill are identical to the Mark 5/V except for the shape of the wing nuts.

The quill lock bushing and stop dial are missing from this pix. The bushing is shown in the last pix below. As is typical for quill stops made in the 1950's, the inner serrated keyed washer does NOT have a flat washer between it and the retaining ring.

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The quill at the top is a Mark V quill. The lower one is the Mark VII quill. See post 3 this thread.

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Apparently a PO installed the lock bushing forcibly with the woodruf key not fully inserted.
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This thread is linked to from https://forum.shopsmith.com/viewtopic.php?t=11373

The Mark VII is essentially the same as a Mark 5/V, but this quill had a couple of unexpected 'features'.

The knurled collar is 'normal'.

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First time I have encountered a broken retaining ring.

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Inside is a surprise. A two piece shaft.

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I am suspicious of the pedigree of this quill. The shaft is blox that is not typical of that era. The two piece quill shaft. The spline end of the shaft appears to have been cut(PO or SS????). The bearing is different from all other models(10mm width rather than 11mm)

The quill described above was NOT an original Mark VII quill.

The following is of a Mark VII quill purchased on e-bay.

This looks more like I expected. Essentially the same as a Mark 5 of the same vintage. The splined shaft is shorter.

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There were two shims that were unexpected(bottom of pix). That is not 'normal'. More about that in the reassembly thread.