Discoloration of dial is not that rare on these models. But this one shows a special face. - water Infiltration? - some kind of glue? Your 2Cents - please! Regards Horst
Very common for this poppy model and the banana, it's water ingress and most examples I have had or seen have unfortunately suffered from this.
@ marturx - like the Patina! The Patina of my Banana has been to "heavy" for me - so I prefered to place a new dial. But not sure about it - maybe one day - there will be a come back.