This is a tricky point. It depends on whether there is a soft spot in the middle of the forefoot, and how worn the heel is. If there is significant heel wear, or the leather of the sole towards the front is starting to become obviously worn, I would re-sole then Vibram.
So. Augusta double zips from ss14. My favourite boot in terms of shape, but they weren't what I expected in terms of colour or leather treatment.
Showroom pics showed a perfectly clean, smooth, black horse leather.....but it came in a blueish colour leather with a treatment that gave them a very dry, almost reverse look.
And after a bit of magic, I've got exactly what I wanted. Perfect jet black, clean shiny thick horse;