variegated squash leaves-saved seed

[Plot70]

Has anyone else had variegated leaves on there squashes like this without buying ornamental seed?
The fruits are setting fine and swelling. The plant is a turban winter squash.
The bed is slightly raised with clay block walls that supported dual wall sheets for frost protection allowing for an early start without transplant stress.
The planting is alternate summer squash and vine producing winter squash.
Reassuringly the leaves are less variegated close to the base of the plant between the summer squashes and in the afternoon shade to the east of the bed so the plant appears to "know what it is doing".
I have a second variegated plant in a later bed that was not covered that is a couple of weeks behind so we will see what that does.
There was one seedling that came up completely yellow that got no further than the first two non true leaves before shrivelling away.

[Shortie]

Hmm I'm definately no expert, but are they definately varigated and not missing a nutrient of some sort?

[Plot70]

No nutrient deficiency. The summer squashes next to it have produced a deep green marrow over two feet long.
The soil is clay that spent a year under pickling couch crass and dock/dandelion roots. Last years crop did well over it and this year much of the compost was taken off to improve two other beds leaving the clay walls to support frost shields and some of the couch grass fibers as a soil improver. The clay contains all the run through nutrients plus the remains of the compost I made above.