The 4 brothers together.
The curious detail you raised, which also raises a question, is that the 478 is less finished than the superb 479 ( housed in the WWW ) and than the not less appealing 488 ( housed in the Mark 11 ), while the Geophysic was less a toolwatch than the WWW or the Mark 11.
Who will complain, actually?
Certainly not you, nor me.
All the best, and thanks for your input, my friend.
Nicolas.