Quote Originally Posted by BobH View Post
From the little I can see of the scales, they appear to be ivory. If they are then there is no way you have cell rot. To have cell rot the scales need to be made of cellulose material, which many were. Better photo of the scales might help determine better what they are made of.

Bob
Same opinion as Bob. Looks like ivory and Heljestrands often were scaled with ivory. So there cannot be the typical cell-root. Maybe it is just old resinfied oil on the blade?
Regards Peter