This models date from the 1st edition of WH40K. Little game : search the nurgling on the photo.
Why choose to paint armors in white for this unit ? Beacause it's the original colour of the Death Guard, first foundation Chapter which fell under the influence of Nurgle. But also because white shows the dirt.

Bubonic, The Pathogenic
You can notice the plaguebearer head and the adominal mouth with a tentacle similar to the one of an old Great Unclean One Model. The only change to the mini is the add of the sword on the side of the palaquin. The Nurgling: there's a lot of Nurglings.

The head is one of a Plaguebearer. The Nurgling sprout out of his belly (alien excess)

The Nurgling is under his rght arm.

Plaguebearer head too.
The nurgling is stuck to his left leg.

The Nurgling sprout of his head (alien 4 excess this time).

This one does not have any nurgling. Only the ancient sculptors know why.

The Nurgling is on his shoulder (too easy...).

This one doesn't have any Nurgling too.

The Nurgling is charging between the legs.

This model is made for sitting on a palanquin. Its armed with an eldar shuriken catapult.