deskthority

These are the keycaps from my SMK-made Tulip keyboard ATK 03.01.44:
Notice how they lack the typical grille pattern of double-shot keycaps.

Here are the keycaps from an SMK-made Apple M0110A:
These have the same solid black first shot, but they don't have the same stepped design.

The stepped design is something seen a lot with SMK keycaps, but they still tend to have the grille look.

Reckon both types are SMK's own production, or that those in the Tulip keyboard are SP's?

I would say no on both counts. The Tulip ones are identical to some other SMK like Laser that used a very close copy of Cherry profile. I am certain they were made in the east somewhere.
The Apple keys are not quite DCS and the internal doesn't match other keys that were made in the Comptec thick era like old Wyse.

I would guess the Apple ones are made by the same OEM that made the old Cherry MX WYSE generation 1 keycaps. Spruce marks and especially the corners seem similar:

Seems so -- I guess I need to assign both to another unidentified doubleshot family.