I would assume they'll stay there
And not miraculously disappear with a treatment
Any more photos ?
Is this box or vache natural or? Hard for me to tell
As to if its mold , or mildew it could be ... But I can't be 100% sure
I hope this helps ?
All the best doc
more pics attached.
it's not box. I don't know what leather it is and still waiting on seller's response.
you don't think it'll disappear with just cleaning. color restore?